51516356125437 has 16 divisors (see below), whose sum is σ = 87223460106880. Its totient is φ = 29437917785856.

The previous prime is 51516356125417. The next prime is 51516356125441. The reversal of 51516356125437 is 73452165361515.

It is a happy number.

51516356125437 is a `hidden beast` number, since 5 + 1 + 5 + 1 + 6 + 35 + 61 + 2 + 543 + 7 = 666.

It is not a de Polignac number, because 51516356125437 - 2¹¹ = 51516356123389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51516356125417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136286656228 + ... + 136286656605.

It is an arithmetic number, because the mean of its divisors is an integer number (5451466256680).

Almost surely, 2^{51516356125437} is an apocalyptic number.

It is an amenable number.

51516356125437 is a deficient number, since it is larger than the sum of its proper divisors (35707103981443).

51516356125437 is a wasteful number, since it uses less digits than its factorization.

51516356125437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272573312849 (or 272573312843 counting only the distinct ones).

The product of its digits is 11340000, while the sum is 54.

The spelling of 51516356125437 in words is "fifty-one trillion, five hundred sixteen billion, three hundred fifty-six million, one hundred twenty-five thousand, four hundred thirty-seven".