51757894976397 has 4 divisors (see below), whose sum is σ = 69010526635200. Its totient is φ = 34505263317596.

The previous prime is 51757894976387. The next prime is 51757894976399. The reversal of 51757894976397 is 79367949875715.

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 51757894976397 - 2¹⁶ = 51757894910861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51757894976399) 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, 8626315829397 + ... + 8626315829402.

It is an arithmetic number, because the mean of its divisors is an integer number (17252631658800).

Almost surely, 2^{51757894976397} is an apocalyptic number.

It is an amenable number.

51757894976397 is a deficient number, since it is larger than the sum of its proper divisors (17252631658803).

51757894976397 is a wasteful number, since it uses less digits than its factorization.

51757894976397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17252631658802.

The product of its digits is 25204737600, while the sum is 87.

The spelling of 51757894976397 in words is "fifty-one trillion, seven hundred fifty-seven billion, eight hundred ninety-four million, nine hundred seventy-six thousand, three hundred ninety-seven".