11531466636 has 12 divisors (see below), whose sum is σ = 26906755512. Its totient is φ = 3843822208.

The previous prime is 11531466631. The next prime is 11531466641. The reversal of 11531466636 is 63666413511.

It is an interprime number because it is at equal distance from previous prime (11531466631) and next prime (11531466641).

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (11531466631) 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, 480477765 + ... + 480477788.

It is an arithmetic number, because the mean of its divisors is an integer number (2242229626).

Almost surely, 2^11531466636 is an apocalyptic number.

It is an amenable number.

11531466636 is an abundant number, since it is smaller than the sum of its proper divisors (15375288876).

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

11531466636 is a wasteful number, since it uses less digits than its factorization.

11531466636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960955560 (or 960955558 counting only the distinct ones).

The product of its digits is 233280, while the sum is 42.

The spelling of 11531466636 in words is "eleven billion, five hundred thirty-one million, four hundred sixty-six thousand, six hundred thirty-six".