999723632054401 has 4 divisors (see below), whose sum is σ = 999723696595204. Its totient is φ = 999723567513600.

The previous prime is 999723632054383. The next prime is 999723632054429. The reversal of 999723632054401 is 104450236327999.

999723632054401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 464623844868225 + 535099787186176 = 21555135^2 + 23132224^2 .

It is a 3-Lehmer number, since φ(999723632054401) divides (999723632054401-1)³.

It is a cyclic number.

It is not a de Polignac number, because 999723632054401 - 2⁵ = 999723632054369 is a prime.

It is a super-2 number, since 2×999723632054401² (a number of 31 digits) contains 22 as substring.

It is a deceptive number, since it divides R_{999723632054400}.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999723632054431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6454081 + ... + 45178561.

It is an arithmetic number, because the mean of its divisors is an integer number (249930924148801).

It is a Poulet number, since it divides 2^{999723632054400}-1.

Almost surely, 2^{999723632054401} is an apocalyptic number.

999723632054401 is the 25816321-st pentagonal number.

It is an amenable number.

999723632054401 is a deficient number, since it is larger than the sum of its proper divisors (64540803).

999723632054401 is a wasteful number, since it uses less digits than its factorization.

999723632054401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64540802.

The product of its (nonzero) digits is 88179840, while the sum is 64.

The spelling of 999723632054401 in words is "nine hundred ninety-nine trillion, seven hundred twenty-three billion, six hundred thirty-two million, fifty-four thousand, four hundred one".