12517691480 has 128 divisors (see below), whose sum is σ = 32672263680. Its totient is φ = 4227578880.

The previous prime is 12517691449. The next prime is 12517691521. The reversal of 12517691480 is 8419671521.

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, 11410292 + ... + 11411388.

It is an arithmetic number, because the mean of its divisors is an integer number (255252060).

Almost surely, 2^12517691480 is an apocalyptic number.

12517691480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12517691480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16336131840).

12517691480 is an abundant number, since it is smaller than the sum of its proper divisors (20154572200).

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

12517691480 is a wasteful number, since it uses less digits than its factorization.

12517691480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1689 (or 1685 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 44.

The spelling of 12517691480 in words is "twelve billion, five hundred seventeen million, six hundred ninety-one thousand, four hundred eighty".