12515423655 has 16 divisors (see below), whose sum is σ = 22885346304. Its totient is φ = 5721336480.

The previous prime is 12515423653. The next prime is 12515423663. The reversal of 12515423655 is 55632451521.

It is not a de Polignac number, because 12515423655 - 2¹ = 12515423653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12515423651) 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, 59597151 + ... + 59597360.

It is an arithmetic number, because the mean of its divisors is an integer number (1430334144).

Almost surely, 2^12515423655 is an apocalyptic number.

12515423655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12515423655 is a deficient number, since it is larger than the sum of its proper divisors (10369922649).

12515423655 is a wasteful number, since it uses less digits than its factorization.

12515423655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119194526.

The product of its digits is 180000, while the sum is 39.

The spelling of 12515423655 in words is "twelve billion, five hundred fifteen million, four hundred twenty-three thousand, six hundred fifty-five".