11938987615 has 16 divisors (see below), whose sum is σ = 14646809952. Its totient is φ = 9339922944.

The previous prime is 11938987609. The next prime is 11938987651. The reversal of 11938987615 is 51678983911.

It is a cyclic number.

It is not a de Polignac number, because 11938987615 - 2³ = 11938987607 is a prime.

It is a super-2 number, since 2×11938987615² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11938987615.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84174 + ... + 175963.

It is an arithmetic number, because the mean of its divisors is an integer number (915425622).

Almost surely, 2^11938987615 is an apocalyptic number.

11938987615 is a deficient number, since it is larger than the sum of its proper divisors (2707822337).

11938987615 is a wasteful number, since it uses less digits than its factorization.

11938987615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260346.

The product of its digits is 3265920, while the sum is 58.

The spelling of 11938987615 in words is "eleven billion, nine hundred thirty-eight million, nine hundred eighty-seven thousand, six hundred fifteen".