51657066512072 has 32 divisors (see below), whose sum is σ = 110695130832000. Its totient is φ = 22138459415424.

The previous prime is 51657066512071. The next prime is 51657066512111. The reversal of 51657066512072 is 27021566075615.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (51657066512071) 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, 1459988 + ... + 10268675.

It is an arithmetic number, because the mean of its divisors is an integer number (3459222838500).

Almost surely, 2^{51657066512072} is an apocalyptic number.

It is an amenable number.

51657066512072 is an abundant number, since it is smaller than the sum of its proper divisors (59038064319928).

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

51657066512072 is a wasteful number, since it uses less digits than its factorization.

51657066512072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11807325 (or 11807321 counting only the distinct ones).

The product of its (nonzero) digits is 5292000, while the sum is 53.

The spelling of 51657066512072 in words is "fifty-one trillion, six hundred fifty-seven billion, sixty-six million, five hundred twelve thousand, seventy-two".