51616932560 has 40 divisors (see below), whose sum is σ = 121110392040. Its totient is φ = 20457349632.

The previous prime is 51616932553. The next prime is 51616932589. The reversal of 51616932560 is 6523961615.

It can be written as a sum of positive squares in 4 ways, for example, as 19201090624 + 32415841936 = 138568^2 + 180044^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2950967 + ... + 2968406.

It is an arithmetic number, because the mean of its divisors is an integer number (3027759801).

Almost surely, 2^51616932560 is an apocalyptic number.

It is an amenable number.

51616932560 is an abundant number, since it is smaller than the sum of its proper divisors (69493459480).

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

51616932560 is a wasteful number, since it uses less digits than its factorization.

51616932560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5919495 (or 5919489 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 44.

The spelling of 51616932560 in words is "fifty-one billion, six hundred sixteen million, nine hundred thirty-two thousand, five hundred sixty".