51561051157 has 16 divisors (see below), whose sum is σ = 64920392064. Its totient is φ = 39779640000.

The previous prime is 51561051131. The next prime is 51561051163. The reversal of 51561051157 is 75115016515.

It is a cyclic number.

It is not a de Polignac number, because 51561051157 - 2²³ = 51552662549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51561051197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3307194 + ... + 3322747.

It is an arithmetic number, because the mean of its divisors is an integer number (4057524504).

Almost surely, 2^51561051157 is an apocalyptic number.

It is an amenable number.

51561051157 is a deficient number, since it is larger than the sum of its proper divisors (13359340907).

51561051157 is a wasteful number, since it uses less digits than its factorization.

51561051157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6630060.

The product of its (nonzero) digits is 26250, while the sum is 37.

The spelling of 51561051157 in words is "fifty-one billion, five hundred sixty-one million, fifty-one thousand, one hundred fifty-seven".