51520875507 has 12 divisors (see below), whose sum is σ = 74579780704. Its totient is φ = 34273063440.

The previous prime is 51520875491. The next prime is 51520875509. The reversal of 51520875507 is 70557802515.

51520875507 is a `hidden beast` number, since 5 + 1 + 520 + 8 + 75 + 50 + 7 = 666.

It is not a de Polignac number, because 51520875507 - 2⁴ = 51520875491 is a prime.

It is a super-2 number, since 2×51520875507² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51520875509) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6177844 + ... + 6186177.

Almost surely, 2^51520875507 is an apocalyptic number.

51520875507 is a deficient number, since it is larger than the sum of its proper divisors (23058905197).

51520875507 is a wasteful number, since it uses less digits than its factorization.

51520875507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12364490 (or 12364487 counting only the distinct ones).

The product of its (nonzero) digits is 490000, while the sum is 45.

The spelling of 51520875507 in words is "fifty-one billion, five hundred twenty million, eight hundred seventy-five thousand, five hundred seven".