11897591718 has 16 divisors (see below), whose sum is σ = 23796324720. Its totient is φ = 3965673696.

The previous prime is 11897591701. The next prime is 11897591743. The reversal of 11897591718 is 81719579811.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153096 + ... + 217332.

It is an arithmetic number, because the mean of its divisors is an integer number (1487270295).

Almost surely, 2^11897591718 is an apocalyptic number.

11897591718 is an abundant number, since it is smaller than the sum of its proper divisors (11898733002).

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

11897591718 is a wasteful number, since it uses less digits than its factorization.

11897591718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95111.

The product of its digits is 1270080, while the sum is 57.

The spelling of 11897591718 in words is "eleven billion, eight hundred ninety-seven million, five hundred ninety-one thousand, seven hundred eighteen".