11538611664 has 40 divisors (see below), whose sum is σ = 31104086592. Its totient is φ = 3678977280.

The previous prime is 11538611663. The next prime is 11538611681. The reversal of 11538611664 is 46611683511.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11538611663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5224717 + ... + 5226924.

Almost surely, 2^11538611664 is an apocalyptic number.

It is an amenable number.

11538611664 is an abundant number, since it is smaller than the sum of its proper divisors (19565474928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11538611664 is a wasteful number, since it uses less digits than its factorization.

11538611664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10451675 (or 10451669 counting only the distinct ones).

The product of its digits is 103680, while the sum is 42.

The spelling of 11538611664 in words is "eleven billion, five hundred thirty-eight million, six hundred eleven thousand, six hundred sixty-four".