51501020684 has 24 divisors (see below), whose sum is σ = 94897768560. Its totient is φ = 24388157376.

The previous prime is 51501020671. The next prime is 51501020687. The reversal of 51501020684 is 48602010515.

It is a self number, because there is not a number n which added to its sum of digits gives 51501020684.

It is not an unprimeable number, because it can be changed into a prime (51501020687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170954 + ... + 363630.

It is an arithmetic number, because the mean of its divisors is an integer number (3954073690).

Almost surely, 2^51501020684 is an apocalyptic number.

It is an amenable number.

51501020684 is a deficient number, since it is larger than the sum of its proper divisors (43396747876).

51501020684 is a wasteful number, since it uses less digits than its factorization.

51501020684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196217 (or 196215 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 32.

The spelling of 51501020684 in words is "fifty-one billion, five hundred one million, twenty thousand, six hundred eighty-four".