11611655656 has 32 divisors (see below), whose sum is σ = 23151552840. Its totient is φ = 5440841728.

The previous prime is 11611655603. The next prime is 11611655669. The reversal of 11611655656 is 65655611611.

It can be written as a sum of positive squares in 4 ways, for example, as 6258392100 + 5353263556 = 79110^2 + 73166^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151531 + ... + 214906.

Almost surely, 2^11611655656 is an apocalyptic number.

It is an amenable number.

11611655656 is a deficient number, since it is larger than the sum of its proper divisors (11539897184).

11611655656 is a wasteful number, since it uses less digits than its factorization.

11611655656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366693 (or 366689 counting only the distinct ones).

The product of its digits is 162000, while the sum is 43.

The spelling of 11611655656 in words is "eleven billion, six hundred eleven million, six hundred fifty-five thousand, six hundred fifty-six".