11475556657 has 4 divisors (see below), whose sum is σ = 11845735936. Its totient is φ = 11105377380.

The previous prime is 11475556633. The next prime is 11475556667. The reversal of 11475556657 is 75665557411.

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, and also an emirpimes, since its reverse is a distinct semiprime: 75665557411 = 15391 ⋅4916221.

It is a de Polignac number, because none of the positive numbers 2^k-11475556657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11475556607) 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, 185089593 + ... + 185089654.

It is an arithmetic number, because the mean of its divisors is an integer number (2961433984).

Almost surely, 2^11475556657 is an apocalyptic number.

It is an amenable number.

11475556657 is a deficient number, since it is larger than the sum of its proper divisors (370179279).

11475556657 is an equidigital number, since it uses as much as digits as its factorization.

11475556657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370179278.

The product of its digits is 4410000, while the sum is 52.

The spelling of 11475556657 in words is "eleven billion, four hundred seventy-five million, five hundred fifty-six thousand, six hundred fifty-seven".