11564633220 has 96 divisors (see below), whose sum is σ = 38615851008. Its totient is φ = 2528414592.

The previous prime is 11564633189. The next prime is 11564633221. The reversal of 11564633220 is 2233646511.

It is not an unprimeable number, because it can be changed into a prime (11564633221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 588924 + ... + 608243.

It is an arithmetic number, because the mean of its divisors is an integer number (402248448).

Almost surely, 2^11564633220 is an apocalyptic number.

11564633220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11564633220 is an abundant number, since it is smaller than the sum of its proper divisors (27051217788).

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

11564633220 is a wasteful number, since it uses less digits than its factorization.

11564633220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197209 (or 1197207 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The spelling of 11564633220 in words is "eleven billion, five hundred sixty-four million, six hundred thirty-three thousand, two hundred twenty".