11371968638 has 16 divisors (see below), whose sum is σ = 17940445056. Its totient is φ = 5398741920.

The previous prime is 11371968589. The next prime is 11371968653. The reversal of 11371968638 is 83686917311.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11371968638.

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, 1727081 + ... + 1733652.

It is an arithmetic number, because the mean of its divisors is an integer number (1121277816).

Almost surely, 2^11371968638 is an apocalyptic number.

11371968638 is a deficient number, since it is larger than the sum of its proper divisors (6568476418).

11371968638 is a wasteful number, since it uses less digits than its factorization.

11371968638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3460819.

The product of its digits is 1306368, while the sum is 53.

The spelling of 11371968638 in words is "eleven billion, three hundred seventy-one million, nine hundred sixty-eight thousand, six hundred thirty-eight".