51018128828 has 12 divisors (see below), whose sum is σ = 89390214480. Its totient is φ = 25478067552.

The previous prime is 51018128813. The next prime is 51018128849. The reversal of 51018128828 is 82882181015.

It is a super-2 number, since 2×51018128828² (a number of 22 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 3 ways as a sum of consecutive naturals, for example, 7745513 + ... + 7752096.

It is an arithmetic number, because the mean of its divisors is an integer number (7449184540).

Almost surely, 2^51018128828 is an apocalyptic number.

It is an amenable number.

51018128828 is a deficient number, since it is larger than the sum of its proper divisors (38372085652).

51018128828 is a wasteful number, since it uses less digits than its factorization.

51018128828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15498436 (or 15498434 counting only the distinct ones).

The product of its (nonzero) digits is 81920, while the sum is 44.

The spelling of 51018128828 in words is "fifty-one billion, eighteen million, one hundred twenty-eight thousand, eight hundred twenty-eight".