51061543747864 has 32 divisors (see below), whose sum is σ = 103469369083920. Its totient is φ = 23483591185536.

The previous prime is 51061543747859. The next prime is 51061543747889. The reversal of 51061543747864 is 46874734516015.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 867420007 + ... + 867478870.

Almost surely, 2^{51061543747864} is an apocalyptic number.

It is an amenable number.

51061543747864 is an abundant number, since it is smaller than the sum of its proper divisors (52407825336056).

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

51061543747864 is a wasteful number, since it uses less digits than its factorization.

51061543747864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1734899179 (or 1734899175 counting only the distinct ones).

The product of its (nonzero) digits is 67737600, while the sum is 61.

The spelling of 51061543747864 in words is "fifty-one trillion, sixty-one billion, five hundred forty-three million, seven hundred forty-seven thousand, eight hundred sixty-four".