11631771660 has 24 divisors (see below), whose sum is σ = 32568960816. Its totient is φ = 3101805760.

The previous prime is 11631771551. The next prime is 11631771661. The reversal of 11631771660 is 6617713611.

It is a happy number.

It is a super-2 number, since 2×11631771660² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11631771661) 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, 96931371 + ... + 96931490.

It is an arithmetic number, because the mean of its divisors is an integer number (1357040034).

Almost surely, 2^11631771660 is an apocalyptic number.

11631771660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11631771660 is an abundant number, since it is smaller than the sum of its proper divisors (20937189156).

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

11631771660 is a wasteful number, since it uses less digits than its factorization.

11631771660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193862873 (or 193862871 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 39.

The spelling of 11631771660 in words is "eleven billion, six hundred thirty-one million, seven hundred seventy-one thousand, six hundred sixty".