11553256664 has 8 divisors (see below), whose sum is σ = 21662356260. Its totient is φ = 5776628328.

The previous prime is 11553256657. The next prime is 11553256667. The reversal of 11553256664 is 46665235511.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11553256667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722078534 + ... + 722078549.

Almost surely, 2^11553256664 is an apocalyptic number.

It is an amenable number.

11553256664 is a deficient number, since it is larger than the sum of its proper divisors (10109099596).

11553256664 is a wasteful number, since it uses less digits than its factorization.

11553256664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444157089 (or 1444157085 counting only the distinct ones).

The product of its digits is 648000, while the sum is 44.

The spelling of 11553256664 in words is "eleven billion, five hundred fifty-three million, two hundred fifty-six thousand, six hundred sixty-four".