999340141575557 has 4 divisors (see below), whose sum is σ = 999340206103980. Its totient is φ = 999340077047136.

The previous prime is 999340141575467. The next prime is 999340141575649. The reversal of 999340141575557 is 755575141043999.

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 405372761444641 + 593967380130916 = 20133871^2 + 24371446^2 .

It is a cyclic number.

It is not a de Polignac number, because 999340141575557 - 2²⁴ = 999340124798341 is a prime.

It is a deceptive number, since it divides R_{999340141575556}.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999340141575857) 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, 6452843 + ... + 45169895.

It is an arithmetic number, because the mean of its divisors is an integer number (249835051525995).

It is a Poulet number, since it divides 2^{999340141575556}-1.

Almost surely, 2^{999340141575557} is an apocalyptic number.

999340141575557 is the 25811369-th pentagonal number.

It is an amenable number.

999340141575557 is a deficient number, since it is larger than the sum of its proper divisors (64528423).

999340141575557 is a wasteful number, since it uses less digits than its factorization.

999340141575557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64528422.

The product of its (nonzero) digits is 1071630000, while the sum is 74.

The spelling of 999340141575557 in words is "nine hundred ninety-nine trillion, three hundred forty billion, one hundred forty-one million, five hundred seventy-five thousand, five hundred fifty-seven".