51576468516 has 36 divisors (see below), whose sum is σ = 130480564032. Its totient is φ = 17178084144.

The previous prime is 51576468491. The next prime is 51576468553. The reversal of 51576468516 is 61586467515.

51576468516 is a `hidden beast` number, since 5 + 1 + 5 + 7 + 64 + 68 + 516 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 541696 + ... + 629751.

It is an arithmetic number, because the mean of its divisors is an integer number (3624460112).

Almost surely, 2^51576468516 is an apocalyptic number.

It is an amenable number.

51576468516 is an abundant number, since it is smaller than the sum of its proper divisors (78904095516).

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

51576468516 is a wasteful number, since it uses less digits than its factorization.

51576468516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172680 (or 1172675 counting only the distinct ones).

The product of its digits is 6048000, while the sum is 54.

The spelling of 51576468516 in words is "fifty-one billion, five hundred seventy-six million, four hundred sixty-eight thousand, five hundred sixteen".