51387507258 has 64 divisors (see below), whose sum is σ = 108855705600. Its totient is φ = 16139502720.

The previous prime is 51387507257. The next prime is 51387507263. The reversal of 51387507258 is 85270578315.

It is a self number, because there is not a number n which added to its sum of digits gives 51387507258.

It is not an unprimeable number, because it can be changed into a prime (51387507257) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3320703 + ... + 3336141.

It is an arithmetic number, because the mean of its divisors is an integer number (1700870400).

Almost surely, 2^51387507258 is an apocalyptic number.

51387507258 is an abundant number, since it is smaller than the sum of its proper divisors (57468198342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51387507258 is a wasteful number, since it uses less digits than its factorization.

51387507258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15827.

The product of its (nonzero) digits is 2352000, while the sum is 51.

The spelling of 51387507258 in words is "fifty-one billion, three hundred eighty-seven million, five hundred seven thousand, two hundred fifty-eight".