12455257815 has 576 divisors, whose sum is σ = 32532864000. Its totient is φ = 4526565120.

The previous prime is 12455257811. The next prime is 12455257817. The reversal of 12455257815 is 51875255421.

It is a happy number.

12455257815 is a `hidden beast` number, since 1 + 2 + 45 + 525 + 7 + 81 + 5 = 666.

It is not a de Polignac number, because 12455257815 - 2² = 12455257811 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12455257811) by changing a digit.

It is a polite number, since it can be written in 575 ways as a sum of consecutive naturals, for example, 655539876 + ... + 655539894.

Almost surely, 2^12455257815 is an apocalyptic number.

12455257815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12455257815 is an abundant number, since it is smaller than the sum of its proper divisors (20077606185).

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

12455257815 is a wasteful number, since it uses less digits than its factorization.

12455257815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95 (or 58 counting only the distinct ones).

The product of its digits is 560000, while the sum is 45.

The spelling of 12455257815 in words is "twelve billion, four hundred fifty-five million, two hundred fifty-seven thousand, eight hundred fifteen".