189317565318 has 48 divisors (see below), whose sum is σ = 441615516480. Its totient is φ = 53947981584.

The previous prime is 189317565263. The next prime is 189317565329. The reversal of 189317565318 is 813565713981.

It is a happy number.

It is a super-2 number, since 2×189317565318² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 738096 + ... + 960947.

It is an arithmetic number, because the mean of its divisors is an integer number (9200323260).

Almost surely, 2^189317565318 is an apocalyptic number.

189317565318 is an abundant number, since it is smaller than the sum of its proper divisors (252297951162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

189317565318 is a wasteful number, since it uses less digits than its factorization.

189317565318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1699441 (or 1699434 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 57.

The spelling of 189317565318 in words is "one hundred eighty-nine billion, three hundred seventeen million, five hundred sixty-five thousand, three hundred eighteen".