51472493664 has 48 divisors (see below), whose sum is σ = 135136818432. Its totient is φ = 17154764928.

The previous prime is 51472493599. The next prime is 51472493689. The reversal of 51472493664 is 46639427415.

It is a tau number, because it is divible by the number of its divisors (48).

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, 615717 + ... + 694299.

It is an arithmetic number, because the mean of its divisors is an integer number (2815350384).

Almost surely, 2^51472493664 is an apocalyptic number.

It is an amenable number.

51472493664 is an abundant number, since it is smaller than the sum of its proper divisors (83664324768).

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

51472493664 is a wasteful number, since it uses less digits than its factorization.

51472493664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85419 (or 85411 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 51.

The spelling of 51472493664 in words is "fifty-one billion, four hundred seventy-two million, four hundred ninety-three thousand, six hundred sixty-four".