12911249560 has 64 divisors (see below), whose sum is σ = 31885850880. Its totient is φ = 4666170240.

The previous prime is 12911249543. The next prime is 12911249563. The reversal of 12911249560 is 6594211921.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12911249563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18292 + ... + 161731.

It is an arithmetic number, because the mean of its divisors is an integer number (498216420).

Almost surely, 2^12911249560 is an apocalyptic number.

12911249560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12911249560 is an abundant number, since it is smaller than the sum of its proper divisors (18974601320).

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

12911249560 is a wasteful number, since it uses less digits than its factorization.

12911249560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180208 (or 180204 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 40.

The spelling of 12911249560 in words is "twelve billion, nine hundred eleven million, two hundred forty-nine thousand, five hundred sixty".