12491379680 has 96 divisors (see below), whose sum is σ = 33650515584. Its totient is φ = 4340883456.

The previous prime is 12491379671. The next prime is 12491379707. The reversal of 12491379680 is 8697319421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141272 + ... + 211991.

It is an arithmetic number, because the mean of its divisors is an integer number (350526204).

Almost surely, 2^12491379680 is an apocalyptic number.

12491379680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12491379680 is an abundant number, since it is smaller than the sum of its proper divisors (21159135904).

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

12491379680 is a wasteful number, since it uses less digits than its factorization.

12491379680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353308 (or 353300 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 50.

The spelling of 12491379680 in words is "twelve billion, four hundred ninety-one million, three hundred seventy-nine thousand, six hundred eighty".