318989985275 has 24 divisors (see below), whose sum is σ = 439715439744. Its totient is φ = 227963059200.

The previous prime is 318989985271. The next prime is 318989985317. The reversal of 318989985275 is 572589989813.

It is not a de Polignac number, because 318989985275 - 2² = 318989985271 is a prime.

It is a super-2 number, since 2×318989985275² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (318989985271) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15820694 + ... + 15840843.

It is an arithmetic number, because the mean of its divisors is an integer number (18321476656).

Almost surely, 2^318989985275 is an apocalyptic number.

318989985275 is a deficient number, since it is larger than the sum of its proper divisors (120725454469).

318989985275 is a wasteful number, since it uses less digits than its factorization.

318989985275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31661591 (or 31661586 counting only the distinct ones).

The product of its digits is 391910400, while the sum is 74.

The spelling of 318989985275 in words is "three hundred eighteen billion, nine hundred eighty-nine million, nine hundred eighty-five thousand, two hundred seventy-five".