12689472015 has 64 divisors (see below), whose sum is σ = 24906631680. Its totient is φ = 6078286080.

The previous prime is 12689472007. The next prime is 12689472041. The reversal of 12689472015 is 51027498621.

It is not a de Polignac number, because 12689472015 - 2³ = 12689472007 is a prime.

It is a super-2 number, since 2×12689472015² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 71779 + ... + 174731.

It is an arithmetic number, because the mean of its divisors is an integer number (389166120).

Almost surely, 2^12689472015 is an apocalyptic number.

12689472015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12689472015 is a deficient number, since it is larger than the sum of its proper divisors (12217159665).

12689472015 is a wasteful number, since it uses less digits than its factorization.

12689472015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103061 (or 103055 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 12689472015 in words is "twelve billion, six hundred eighty-nine million, four hundred seventy-two thousand, fifteen".