51516560502 has 48 divisors (see below), whose sum is σ = 122163193152. Its totient is φ = 15560210160.

The previous prime is 51516560449. The next prime is 51516560503. The reversal of 51516560502 is 20506561515.

51516560502 is a `hidden beast` number, since 51 + 51 + 6 + 56 + 0 + 502 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51516560503) 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, 362968 + ... + 484539.

It is an arithmetic number, because the mean of its divisors is an integer number (2545066524).

Almost surely, 2^51516560502 is an apocalyptic number.

51516560502 is an abundant number, since it is smaller than the sum of its proper divisors (70646632650).

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

51516560502 is a wasteful number, since it uses less digits than its factorization.

51516560502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847833 (or 847830 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The spelling of 51516560502 in words is "fifty-one billion, five hundred sixteen million, five hundred sixty thousand, five hundred two".