318861484557 has 32 divisors (see below), whose sum is σ = 544381292544. Its totient is φ = 161165505600.

The previous prime is 318861484549. The next prime is 318861484559. The reversal of 318861484557 is 755484168813.

It is not a de Polignac number, because 318861484557 - 2³ = 318861484549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 318861484557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318861484559) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18644869 + ... + 18661962.

It is an arithmetic number, because the mean of its divisors is an integer number (17011915392).

Almost surely, 2^318861484557 is an apocalyptic number.

318861484557 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

318861484557 is a deficient number, since it is larger than the sum of its proper divisors (225519807987).

318861484557 is a wasteful number, since it uses less digits than its factorization.

318861484557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37306889.

The product of its digits is 25804800, while the sum is 60.

The spelling of 318861484557 in words is "three hundred eighteen billion, eight hundred sixty-one million, four hundred eighty-four thousand, five hundred fifty-seven".