51557570751 has 16 divisors (see below), whose sum is σ = 68924808288. Its totient is φ = 34281139200.

The previous prime is 51557570747. The next prime is 51557570761. The reversal of 51557570751 is 15707575515.

It is not a de Polignac number, because 51557570751 - 2² = 51557570747 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51557570751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51557570741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1876231 + ... + 1903511.

It is an arithmetic number, because the mean of its divisors is an integer number (4307800518).

Almost surely, 2^51557570751 is an apocalyptic number.

51557570751 is a deficient number, since it is larger than the sum of its proper divisors (17367237537).

51557570751 is a wasteful number, since it uses less digits than its factorization.

51557570751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28922.

The product of its (nonzero) digits is 1071875, while the sum is 48.

The spelling of 51557570751 in words is "fifty-one billion, five hundred fifty-seven million, five hundred seventy thousand, seven hundred fifty-one".