1957597005913 has 4 divisors (see below), whose sum is σ = 1957748900020. Its totient is φ = 1957445111808.

The previous prime is 1957597005887. The next prime is 1957597005929. The reversal of 1957597005913 is 3195007957591.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1203733733904 + 753863272009 = 1097148^2 + 868253^2 .

It is a cyclic number.

It is not a de Polignac number, because 1957597005913 - 2³³ = 1949007071321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1957597005113) 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, 75927720 + ... + 75953497.

It is an arithmetic number, because the mean of its divisors is an integer number (489437225005).

Almost surely, 2^{1957597005913} is an apocalyptic number.

It is an amenable number.

1957597005913 is a deficient number, since it is larger than the sum of its proper divisors (151894107).

1957597005913 is a wasteful number, since it uses less digits than its factorization.

1957597005913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151894106.

The product of its (nonzero) digits is 13395375, while the sum is 61.

The spelling of 1957597005913 in words is "one trillion, nine hundred fifty-seven billion, five hundred ninety-seven million, five thousand, nine hundred thirteen".