51486379928788 has 48 divisors (see below), whose sum is σ = 103359912582528. Its totient is φ = 21982661568000.

The previous prime is 51486379928771. The next prime is 51486379928813. The reversal of 51486379928788 is 88782997368415.

It is a super-2 number, since 2×51486379928788² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

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, 38773608 + ... + 40079488.

It is an arithmetic number, because the mean of its divisors is an integer number (2153331512136).

Almost surely, 2^{51486379928788} is an apocalyptic number.

It is an amenable number.

51486379928788 is an abundant number, since it is smaller than the sum of its proper divisors (51873532653740).

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

51486379928788 is a wasteful number, since it uses less digits than its factorization.

51486379928788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311184 (or 1311182 counting only the distinct ones).

The product of its digits is 11705057280, while the sum is 85.

The spelling of 51486379928788 in words is "fifty-one trillion, four hundred eighty-six billion, three hundred seventy-nine million, nine hundred twenty-eight thousand, seven hundred eighty-eight".