318747985919 has 8 divisors (see below), whose sum is σ = 347748774912. Its totient is φ = 289751146840.

The previous prime is 318747985783. The next prime is 318747985939. The reversal of 318747985919 is 919589747813.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 318747985919 - 2¹² = 318747981823 is a prime.

It is a super-2 number, since 2×318747985919² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318747985939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 817469 + ... + 1142694.

It is an arithmetic number, because the mean of its divisors is an integer number (43468596864).

Almost surely, 2^318747985919 is an apocalyptic number.

318747985919 is a deficient number, since it is larger than the sum of its proper divisors (29000788993).

318747985919 is a wasteful number, since it uses less digits than its factorization.

318747985919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1974957.

The product of its digits is 137168640, while the sum is 71.

The spelling of 318747985919 in words is "three hundred eighteen billion, seven hundred forty-seven million, nine hundred eighty-five thousand, nine hundred nineteen".