51534626645 has 16 divisors (see below), whose sum is σ = 63057571200. Its totient is φ = 40421371200.

The previous prime is 51534626629. The next prime is 51534626651. The reversal of 51534626645 is 54662643515.

It is not a de Polignac number, because 51534626645 - 2⁴ = 51534626629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51534626645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176795 + ... + 366504.

It is an arithmetic number, because the mean of its divisors is an integer number (3941098200).

Almost surely, 2^51534626645 is an apocalyptic number.

It is an amenable number.

51534626645 is a deficient number, since it is larger than the sum of its proper divisors (11522944555).

51534626645 is a wasteful number, since it uses less digits than its factorization.

51534626645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543676.

The product of its digits is 2592000, while the sum is 47.

The spelling of 51534626645 in words is "fifty-one billion, five hundred thirty-four million, six hundred twenty-six thousand, six hundred forty-five".