12506388817 has 16 divisors (see below), whose sum is σ = 13578001920. Its totient is φ = 11450664000.

The previous prime is 12506388809. The next prime is 12506388841. The reversal of 12506388817 is 71888360521.

It is a cyclic number.

It is not a de Polignac number, because 12506388817 - 2³ = 12506388809 is a prime.

It is a super-2 number, since 2×12506388817² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12506308817) 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, 1406967 + ... + 1415827.

It is an arithmetic number, because the mean of its divisors is an integer number (848625120).

Almost surely, 2^12506388817 is an apocalyptic number.

It is an amenable number.

12506388817 is a deficient number, since it is larger than the sum of its proper divisors (1071613103).

12506388817 is a wasteful number, since it uses less digits than its factorization.

12506388817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9744.

The product of its (nonzero) digits is 645120, while the sum is 49.

The spelling of 12506388817 in words is "twelve billion, five hundred six million, three hundred eighty-eight thousand, eight hundred seventeen".