736031557161161 has 4 divisors (see below), whose sum is σ = 736032072740292. Its totient is φ = 736031041582032.

The previous prime is 736031557161149. The next prime is 736031557161179. The reversal of 736031557161161 is 161161755130637.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19321343316025 + 716710213845136 = 4395605^2 + 26771444^2 .

It is a cyclic number.

It is not a de Polignac number, because 736031557161161 - 2²⁶ = 736031490052297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (736031557161361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255642230 + ... + 258505343.

It is an arithmetic number, because the mean of its divisors is an integer number (184008018185073).

Almost surely, 2^{736031557161161} is an apocalyptic number.

It is an amenable number.

736031557161161 is a deficient number, since it is larger than the sum of its proper divisors (515579131).

736031557161161 is a wasteful number, since it uses less digits than its factorization.

736031557161161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515579130.

The product of its (nonzero) digits is 2381400, while the sum is 53.

The spelling of 736031557161161 in words is "seven hundred thirty-six trillion, thirty-one billion, five hundred fifty-seven million, one hundred sixty-one thousand, one hundred sixty-one".