12509615790 has 48 divisors (see below), whose sum is σ = 37171431648. Its totient is φ = 2859340608.

The previous prime is 12509615759. The next prime is 12509615813. The reversal of 12509615790 is 9751690521.

12509615790 is a `hidden beast` number, since 1 + 2 + 509 + 6 + 1 + 57 + 90 = 666.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9927637 + ... + 9928896.

It is an arithmetic number, because the mean of its divisors is an integer number (774404826).

Almost surely, 2^12509615790 is an apocalyptic number.

12509615790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12509615790 is an abundant number, since it is smaller than the sum of its proper divisors (24661815858).

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

12509615790 is a wasteful number, since it uses less digits than its factorization.

12509615790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19856553 (or 19856550 counting only the distinct ones).

The product of its (nonzero) digits is 170100, while the sum is 45.

The spelling of 12509615790 in words is "twelve billion, five hundred nine million, six hundred fifteen thousand, seven hundred ninety".