1957545057917 has 4 divisors (see below), whose sum is σ = 1957735880640. Its totient is φ = 1957354235196.

The previous prime is 1957545057887. The next prime is 1957545057931. The reversal of 1957545057917 is 7197505457591.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1957545057917 - 2²⁸ = 1957276622461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1957545057977) 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, 95395973 + ... + 95416490.

It is an arithmetic number, because the mean of its divisors is an integer number (489433970160).

Almost surely, 2^{1957545057917} is an apocalyptic number.

It is an amenable number.

1957545057917 is a deficient number, since it is larger than the sum of its proper divisors (190822723).

1957545057917 is a wasteful number, since it uses less digits than its factorization.

1957545057917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190822722.

The product of its (nonzero) digits is 69457500, while the sum is 65.

The spelling of 1957545057917 in words is "one trillion, nine hundred fifty-seven billion, five hundred forty-five million, fifty-seven thousand, nine hundred seventeen".