51352565645 has 16 divisors (see below), whose sum is σ = 62248398912. Its totient is φ = 40667184000.

The previous prime is 51352565633. The next prime is 51352565651. The reversal of 51352565645 is 54656525315.

It is not a de Polignac number, because 51352565645 - 2⁶ = 51352565581 is a prime.

It is a super-3 number, since 3×51352565645³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51352565645.

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, 79049 + ... + 330081.

It is an arithmetic number, because the mean of its divisors is an integer number (3890524932).

Almost surely, 2^51352565645 is an apocalyptic number.

It is an amenable number.

51352565645 is a deficient number, since it is larger than the sum of its proper divisors (10895833267).

51352565645 is a wasteful number, since it uses less digits than its factorization.

51352565645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251452.

The product of its digits is 2700000, while the sum is 47.

The spelling of 51352565645 in words is "fifty-one billion, three hundred fifty-two million, five hundred sixty-five thousand, six hundred forty-five".