11899697518 has 16 divisors (see below), whose sum is σ = 18097821504. Its totient is φ = 5867527680.

The previous prime is 11899697507. The next prime is 11899697527. The reversal of 11899697518 is 81579699811.

It is a self number, because there is not a number n which added to its sum of digits gives 11899697518.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54630 + ... + 163657.

It is an arithmetic number, because the mean of its divisors is an integer number (1131113844).

Almost surely, 2^11899697518 is an apocalyptic number.

11899697518 is a deficient number, since it is larger than the sum of its proper divisors (6198123986).

11899697518 is a wasteful number, since it uses less digits than its factorization.

11899697518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218667.

The product of its digits is 9797760, while the sum is 64.

The spelling of 11899697518 in words is "eleven billion, eight hundred ninety-nine million, six hundred ninety-seven thousand, five hundred eighteen".