51616066516 has 24 divisors (see below), whose sum is σ = 103248008640. Its totient is φ = 22117769472.

The previous prime is 51616066459. The next prime is 51616066543. The reversal of 51616066516 is 61566061615.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48036 + ... + 324868.

It is an arithmetic number, because the mean of its divisors is an integer number (4302000360).

Almost surely, 2^51616066516 is an apocalyptic number.

It is an amenable number.

51616066516 is an abundant number, since it is smaller than the sum of its proper divisors (51631942124).

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

51616066516 is a wasteful number, since it uses less digits than its factorization.

51616066516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283503 (or 283501 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 51616066516 in words is "fifty-one billion, six hundred sixteen million, sixty-six thousand, five hundred sixteen".