51461745624 has 24 divisors (see below), whose sum is σ = 139375561260. Its totient is φ = 17153915184.

The previous prime is 51461745571. The next prime is 51461745631. The reversal of 51461745624 is 42654716415.

51461745624 is a `hidden beast` number, since 5 + 1 + 4 + 6 + 17 + 4 + 5 + 624 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×51461745624² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51461745624.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 357373162 + ... + 357373305.

Almost surely, 2^51461745624 is an apocalyptic number.

It is an amenable number.

51461745624 is an abundant number, since it is smaller than the sum of its proper divisors (87913815636).

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

51461745624 is a wasteful number, since it uses less digits than its factorization.

51461745624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714746479 (or 714746472 counting only the distinct ones).

The product of its digits is 806400, while the sum is 45.

The spelling of 51461745624 in words is "fifty-one billion, four hundred sixty-one million, seven hundred forty-five thousand, six hundred twenty-four".