11611137655 has 16 divisors (see below), whose sum is σ = 15082925760. Its totient is φ = 8529942528.

The previous prime is 11611137641. The next prime is 11611137667. The reversal of 11611137655 is 55673111611.

It is a cyclic number.

It is not a de Polignac number, because 11611137655 - 2¹⁵ = 11611104887 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 450235 + ... + 475324.

It is an arithmetic number, because the mean of its divisors is an integer number (942682860).

Almost surely, 2^11611137655 is an apocalyptic number.

11611137655 is a deficient number, since it is larger than the sum of its proper divisors (3471788105).

11611137655 is a wasteful number, since it uses less digits than its factorization.

11611137655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925770.

The product of its digits is 18900, while the sum is 37.

The spelling of 11611137655 in words is "eleven billion, six hundred eleven million, one hundred thirty-seven thousand, six hundred fifty-five".