12649281250 has 56 divisors (see below), whose sum is σ = 24749683200. Its totient is φ = 4839450000.

The previous prime is 12649281209. The next prime is 12649281263. The reversal of 12649281250 is 5218294621.

It is a happy number.

It is a super-2 number, since 2×12649281250² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 709951 + ... + 727549.

Almost surely, 2^12649281250 is an apocalyptic number.

12649281250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12649281250 is a deficient number, since it is larger than the sum of its proper divisors (12100401950).

12649281250 is an frugal number, since it uses more digits than its factorization.

12649281250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17654 (or 17629 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The spelling of 12649281250 in words is "twelve billion, six hundred forty-nine million, two hundred eighty-one thousand, two hundred fifty".