318861510057 has 6 divisors (see below), whose sum is σ = 460577736762. Its totient is φ = 212574340032.

The previous prime is 318861510047. The next prime is 318861510059. The reversal of 318861510057 is 750015168813.

318861510057 is a `hidden beast` number, since 3 + 1 + 8 + 86 + 1 + 510 + 0 + 57 = 666.

It can be written as a sum of positive squares in only one way, i.e., 296454114576 + 22407395481 = 544476^2 + 149691^2 .

It is not a de Polignac number, because 318861510057 - 2³⁶ = 250142033321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 318861509994 and 318861510021.

It is not an unprimeable number, because it can be changed into a prime (318861510059) 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 5 ways as a sum of consecutive naturals, for example, 17714528328 + ... + 17714528345.

It is an arithmetic number, because the mean of its divisors is an integer number (76762956127).

Almost surely, 2^318861510057 is an apocalyptic number.

It is an amenable number.

318861510057 is a deficient number, since it is larger than the sum of its proper divisors (141716226705).

318861510057 is a wasteful number, since it uses less digits than its factorization.

318861510057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35429056679 (or 35429056676 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 45.

The spelling of 318861510057 in words is "three hundred eighteen billion, eight hundred sixty-one million, five hundred ten thousand, fifty-seven".