51155060157 has 12 divisors (see below), whose sum is σ = 74142832764. Its totient is φ = 33986977920.

The previous prime is 51155060149. The next prime is 51155060167. The reversal of 51155060157 is 75106055115.

It is a happy number.

51155060157 is a `hidden beast` number, since 51 + 1 + 550 + 6 + 0 + 1 + 57 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 38327459076 + 12827601081 = 195774^2 + 113259^2 .

It is not a de Polignac number, because 51155060157 - 2³ = 51155060149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51155060137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9696844 + ... + 9702117.

It is an arithmetic number, because the mean of its divisors is an integer number (6178569397).

Almost surely, 2^51155060157 is an apocalyptic number.

It is an amenable number.

51155060157 is a deficient number, since it is larger than the sum of its proper divisors (22987772607).

51155060157 is a wasteful number, since it uses less digits than its factorization.

51155060157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19399260 (or 19399257 counting only the distinct ones).

The product of its (nonzero) digits is 26250, while the sum is 36.

The spelling of 51155060157 in words is "fifty-one billion, one hundred fifty-five million, sixty thousand, one hundred fifty-seven".