11657647401 has 4 divisors (see below), whose sum is σ = 15543529872. Its totient is φ = 7771764932.

The previous prime is 11657647363. The next prime is 11657647409. The reversal of 11657647401 is 10474675611.

It is a happy number.

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 not a de Polignac number, because 11657647401 - 2²⁹ = 11120776489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11657647409) 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, 1942941231 + ... + 1942941236.

It is an arithmetic number, because the mean of its divisors is an integer number (3885882468).

Almost surely, 2^11657647401 is an apocalyptic number.

It is an amenable number.

11657647401 is a deficient number, since it is larger than the sum of its proper divisors (3885882471).

11657647401 is an equidigital number, since it uses as much as digits as its factorization.

11657647401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3885882470.

The product of its (nonzero) digits is 141120, while the sum is 42.

The spelling of 11657647401 in words is "eleven billion, six hundred fifty-seven million, six hundred forty-seven thousand, four hundred one".