51729654980 has 48 divisors (see below), whose sum is σ = 115460042880. Its totient is φ = 19412483328.

The previous prime is 51729654947. The next prime is 51729655007. The reversal of 51729654980 is 8945692715.

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, 621689 + ... + 699968.

It is an arithmetic number, because the mean of its divisors is an integer number (2405417560).

Almost surely, 2^51729654980 is an apocalyptic number.

It is an amenable number.

51729654980 is an abundant number, since it is smaller than the sum of its proper divisors (63730387900).

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

51729654980 is a wasteful number, since it uses less digits than its factorization.

51729654980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321788 (or 1321786 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 56.

The spelling of 51729654980 in words is "fifty-one billion, seven hundred twenty-nine million, six hundred fifty-four thousand, nine hundred eighty".