318738155761 has 9 divisors (see below), whose sum is σ = 319855949049. Its totient is φ = 317624261124.

The previous prime is 318738155753. The next prime is 318738155767. The reversal of 318738155761 is 167551837813.

The square root of 318738155761 is 564569.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 318738155761 - 2³ = 318738155753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (318738155767) 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 8 ways as a sum of consecutive naturals, for example, 195904630 + ... + 195906256.

Almost surely, 2^318738155761 is an apocalyptic number.

318738155761 is the 564569-th square number.

318738155761 is the 282285-th centered octagonal number.

It is an amenable number.

318738155761 is a deficient number, since it is larger than the sum of its proper divisors (1117793288).

318738155761 is an frugal number, since it uses more digits than its factorization.

318738155761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3948 (or 1974 counting only the distinct ones).

The product of its digits is 4233600, while the sum is 55.

The spelling of 318738155761 in words is "three hundred eighteen billion, seven hundred thirty-eight million, one hundred fifty-five thousand, seven hundred sixty-one".