51352721668328 has 16 divisors (see below), whose sum is σ = 96540406836000. Its totient is φ = 25608613178736.

The previous prime is 51352721668319. The next prime is 51352721668337. The reversal of 51352721668328 is 82386612725315.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51352721668319) and next prime (51352721668337).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8468453708 + ... + 8468459771.

It is an arithmetic number, because the mean of its divisors is an integer number (6033775427250).

Almost surely, 2^{51352721668328} is an apocalyptic number.

It is an amenable number.

51352721668328 is a deficient number, since it is larger than the sum of its proper divisors (45187685167672).

51352721668328 is a wasteful number, since it uses less digits than its factorization.

51352721668328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16936913864 (or 16936913860 counting only the distinct ones).

The product of its digits is 29030400, while the sum is 59.

The spelling of 51352721668328 in words is "fifty-one trillion, three hundred fifty-two billion, seven hundred twenty-one million, six hundred sixty-eight thousand, three hundred twenty-eight".