51516016615089 has 72 divisors (see below), whose sum is σ = 84948317213760. Its totient is φ = 29987198407296.

The previous prime is 51516016615069. The next prime is 51516016615099. The reversal of 51516016615089 is 98051661061515.

51516016615089 is a `hidden beast` number, since 5 + 1 + 5 + 1 + 6 + 0 + 16 + 615 + 0 + 8 + 9 = 666.

It is not a de Polignac number, because 51516016615089 - 2¹¹ = 51516016613041 is a prime.

It is a super-2 number, since 2×51516016615089² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51516016615009) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 17320047 + ... + 20075259.

It is an arithmetic number, because the mean of its divisors is an integer number (1179837739080).

Almost surely, 2^{51516016615089} is an apocalyptic number.

It is an amenable number.

51516016615089 is a deficient number, since it is larger than the sum of its proper divisors (33432300598671).

51516016615089 is a wasteful number, since it uses less digits than its factorization.

51516016615089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2755911 (or 2755895 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 54.

The spelling of 51516016615089 in words is "fifty-one trillion, five hundred sixteen billion, sixteen million, six hundred fifteen thousand, eighty-nine".