51167885121 has 12 divisors (see below), whose sum is σ = 74080656000. Its totient is φ = 34032774840.

The previous prime is 51167885117. The next prime is 51167885123. The reversal of 51167885121 is 12158876115.

51167885121 is a `hidden beast` number, since 51 + 1 + 6 + 7 + 88 + 512 + 1 = 666.

It is not a de Polignac number, because 51167885121 - 2² = 51167885117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51167885123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6591621 + ... + 6599378.

It is an arithmetic number, because the mean of its divisors is an integer number (6173388000).

Almost surely, 2^51167885121 is an apocalyptic number.

It is an amenable number.

51167885121 is a deficient number, since it is larger than the sum of its proper divisors (22912770879).

51167885121 is a wasteful number, since it uses less digits than its factorization.

51167885121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13191436 (or 13191433 counting only the distinct ones).

The product of its digits is 134400, while the sum is 45.

The spelling of 51167885121 in words is "fifty-one billion, one hundred sixty-seven million, eight hundred eighty-five thousand, one hundred twenty-one".