11621687558 has 12 divisors (see below), whose sum is σ = 18876646908. Its totient is φ = 5363855640.

The previous prime is 11621687537. The next prime is 11621687599. The reversal of 11621687558 is 85578612611.

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 5 ways as a sum of consecutive naturals, for example, 17191508 + ... + 17192183.

It is an arithmetic number, because the mean of its divisors is an integer number (1573053909).

Almost surely, 2^11621687558 is an apocalyptic number.

11621687558 is a deficient number, since it is larger than the sum of its proper divisors (7254959350).

11621687558 is a wasteful number, since it uses less digits than its factorization.

11621687558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34383719 (or 34383706 counting only the distinct ones).

The product of its digits is 806400, while the sum is 50.

The spelling of 11621687558 in words is "eleven billion, six hundred twenty-one million, six hundred eighty-seven thousand, five hundred fifty-eight".