51450861560 has 64 divisors (see below), whose sum is σ = 136864382400. Its totient is φ = 17032006656.

The previous prime is 51450861551. The next prime is 51450861587. The reversal of 51450861560 is 6516805415.

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, 3160037 + ... + 3176276.

It is an arithmetic number, because the mean of its divisors is an integer number (2138505975).

Almost surely, 2^51450861560 is an apocalyptic number.

It is an amenable number.

51450861560 is an abundant number, since it is smaller than the sum of its proper divisors (85413520840).

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

51450861560 is a wasteful number, since it uses less digits than its factorization.

51450861560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6336360 (or 6336356 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 41.

The spelling of 51450861560 in words is "fifty-one billion, four hundred fifty million, eight hundred sixty-one thousand, five hundred sixty".