51455508672 has 28 divisors (see below), whose sum is σ = 136142700536. Its totient is φ = 17151836160.

The previous prime is 51455508649. The next prime is 51455508697. The reversal of 51455508672 is 27680555415.

It is a Harshad number since it is a multiple of its sum of digits (48).

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 3 ways as a sum of consecutive naturals, for example, 133998529 + ... + 133998912.

Almost surely, 2^51455508672 is an apocalyptic number.

It is an amenable number.

51455508672 is an abundant number, since it is smaller than the sum of its proper divisors (84687191864).

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

51455508672 is a wasteful number, since it uses less digits than its factorization.

51455508672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267997456 (or 267997446 counting only the distinct ones).

The product of its (nonzero) digits is 1680000, while the sum is 48.

The spelling of 51455508672 in words is "fifty-one billion, four hundred fifty-five million, five hundred eight thousand, six hundred seventy-two".