73136556857 has 12 divisors (see below), whose sum is σ = 91621621476. Its totient is φ = 57866286240.

The previous prime is 73136556847. The next prime is 73136556887. The reversal of 73136556857 is 75865563137.

It can be written as a sum of positive squares in 2 ways, for example, as 19733506576 + 53403050281 = 140476^2 + 231091^2 .

It is not a de Polignac number, because 73136556857 - 2⁴ = 73136556841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (73136556847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57406394 + ... + 57407667.

It is an arithmetic number, because the mean of its divisors is an integer number (7635135123).

Almost surely, 2^73136556857 is an apocalyptic number.

It is an amenable number.

73136556857 is a deficient number, since it is larger than the sum of its proper divisors (18485064619).

73136556857 is a wasteful number, since it uses less digits than its factorization.

73136556857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114814088 (or 114814081 counting only the distinct ones).

The product of its digits is 15876000, while the sum is 56.

The spelling of 73136556857 in words is "seventy-three billion, one hundred thirty-six million, five hundred fifty-six thousand, eight hundred fifty-seven".