12508909650 has 48 divisors (see below), whose sum is σ = 34468999200. Its totient is φ = 3335708880.

The previous prime is 12508909571. The next prime is 12508909661. The reversal of 12508909650 is 5690980521.

12508909650 is a `hidden beast` number, since 1 + 2 + 508 + 9 + 0 + 96 + 50 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 12508909596 and 12508909605.

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, 4631580 + ... + 4634279.

It is an arithmetic number, because the mean of its divisors is an integer number (718104150).

Almost surely, 2^12508909650 is an apocalyptic number.

12508909650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12508909650 is an abundant number, since it is smaller than the sum of its proper divisors (21960089550).

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

12508909650 is a wasteful number, since it uses less digits than its factorization.

12508909650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9265880 (or 9265869 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The spelling of 12508909650 in words is "twelve billion, five hundred eight million, nine hundred nine thousand, six hundred fifty".