51218680788 has 72 divisors (see below), whose sum is σ = 141295452480. Its totient is φ = 15514652160.

The previous prime is 51218680787. The next prime is 51218680801. The reversal of 51218680788 is 88708681215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51218680787) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1027833 + ... + 1076511.

It is an arithmetic number, because the mean of its divisors is an integer number (1962436840).

Almost surely, 2^51218680788 is an apocalyptic number.

It is an amenable number.

51218680788 is an abundant number, since it is smaller than the sum of its proper divisors (90076771692).

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

51218680788 is a wasteful number, since it uses less digits than its factorization.

51218680788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51357 (or 51352 counting only the distinct ones).

The product of its (nonzero) digits is 1720320, while the sum is 54.

The spelling of 51218680788 in words is "fifty-one billion, two hundred eighteen million, six hundred eighty thousand, seven hundred eighty-eight".