11663636231 has 24 divisors (see below), whose sum is σ = 12932296704. Its totient is φ = 10509826080.

The previous prime is 11663636227. The next prime is 11663636269. The reversal of 11663636231 is 13263636611.

It is not a de Polignac number, because 11663636231 - 2² = 11663636227 is a prime.

It is a super-2 number, since 2×11663636231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11663636531) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3421730 + ... + 3425136.

It is an arithmetic number, because the mean of its divisors is an integer number (538845696).

Almost surely, 2^11663636231 is an apocalyptic number.

11663636231 is a deficient number, since it is larger than the sum of its proper divisors (1268660473).

11663636231 is a wasteful number, since it uses less digits than its factorization.

11663636231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3911 (or 3898 counting only the distinct ones).

The product of its digits is 69984, while the sum is 38.

The spelling of 11663636231 in words is "eleven billion, six hundred sixty-three million, six hundred thirty-six thousand, two hundred thirty-one".