999746101050401 has 4 divisors (see below), whose sum is σ = 999746174070804. Its totient is φ = 999746028030000.

The previous prime is 999746101050397. The next prime is 999746101050427. The reversal of 999746101050401 is 104050101647999.

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 847450262778001 + 152295838272400 = 29110999^2 + 12340820^2 .

It is a cyclic number.

It is not a de Polignac number, because 999746101050401 - 2² = 999746101050397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (999746101050461) 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, 9127550 + ... + 45637751.

It is an arithmetic number, because the mean of its divisors is an integer number (249936543517701).

It is a Poulet number, since it divides 2^{999746101050400}-1.

Almost surely, 2^{999746101050401} is an apocalyptic number.

999746101050401 is the 18255101-st octagonal number.

It is an amenable number.

999746101050401 is a deficient number, since it is larger than the sum of its proper divisors (73020403).

999746101050401 is a wasteful number, since it uses less digits than its factorization.

999746101050401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73020402.

The product of its (nonzero) digits is 2449440, while the sum is 56.

The spelling of 999746101050401 in words is "nine hundred ninety-nine trillion, seven hundred forty-six billion, one hundred one million, fifty thousand, four hundred one".