11553616655 has 24 divisors (see below), whose sum is σ = 16230685248. Its totient is φ = 7871992128.

The previous prime is 11553616643. The next prime is 11553616661. The reversal of 11553616655 is 55661635511.

It is not a de Polignac number, because 11553616655 - 2⁴ = 11553616639 is a prime.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 111719 + ... + 188648.

It is an arithmetic number, because the mean of its divisors is an integer number (676278552).

Almost surely, 2^11553616655 is an apocalyptic number.

11553616655 is a deficient number, since it is larger than the sum of its proper divisors (4677068593).

11553616655 is a wasteful number, since it uses less digits than its factorization.

11553616655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300543 (or 300536 counting only the distinct ones).

The product of its digits is 405000, while the sum is 44.

The spelling of 11553616655 in words is "eleven billion, five hundred fifty-three million, six hundred sixteen thousand, six hundred fifty-five".