12115691630 has 64 divisors (see below), whose sum is σ = 26011808640. Its totient is φ = 3975143424.

The previous prime is 12115691629. The next prime is 12115691729. The reversal of 12115691630 is 3619651121.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 202982 + ... + 255798.

It is an arithmetic number, because the mean of its divisors is an integer number (406434510).

Almost surely, 2^12115691630 is an apocalyptic number.

12115691630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12115691630 is an abundant number, since it is smaller than the sum of its proper divisors (13896117010).

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

12115691630 is a wasteful number, since it uses less digits than its factorization.

12115691630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52973.

The product of its (nonzero) digits is 9720, while the sum is 35.

The spelling of 12115691630 in words is "twelve billion, one hundred fifteen million, six hundred ninety-one thousand, six hundred thirty".