12665610615 has 64 divisors (see below), whose sum is σ = 24687820800. Its totient is φ = 5415755904.

The previous prime is 12665610613. The next prime is 12665610647. The reversal of 12665610615 is 51601656621.

It is not a de Polignac number, because 12665610615 - 2¹ = 12665610613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12665610613) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 117424 + ... + 197786.

It is an arithmetic number, because the mean of its divisors is an integer number (385747200).

Almost surely, 2^12665610615 is an apocalyptic number.

12665610615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12665610615 is a deficient number, since it is larger than the sum of its proper divisors (12022210185).

12665610615 is a wasteful number, since it uses less digits than its factorization.

12665610615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80476.

The product of its (nonzero) digits is 64800, while the sum is 39.

The spelling of 12665610615 in words is "twelve billion, six hundred sixty-five million, six hundred ten thousand, six hundred fifteen".