11115655657 has 4 divisors (see below), whose sum is σ = 11137754880. Its totient is φ = 11093556436.

The previous prime is 11115655651. The next prime is 11115655667. The reversal of 11115655657 is 75655651111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11115655657 is a prime.

It is a super-2 number, since 2×11115655657² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11115655651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11048857 + ... + 11049862.

It is an arithmetic number, because the mean of its divisors is an integer number (2784438720).

Almost surely, 2^11115655657 is an apocalyptic number.

It is an amenable number.

11115655657 is a deficient number, since it is larger than the sum of its proper divisors (22099223).

11115655657 is an equidigital number, since it uses as much as digits as its factorization.

11115655657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22099222.

The product of its digits is 157500, while the sum is 43.

The spelling of 11115655657 in words is "eleven billion, one hundred fifteen million, six hundred fifty-five thousand, six hundred fifty-seven".