12897452650 has 24 divisors (see below), whose sum is σ = 24382534284. Its totient is φ = 5074406400.

The previous prime is 12897452597. The next prime is 12897452669. The reversal of 12897452650 is 5625479821.

It can be written as a sum of positive squares in 6 ways, for example, as 2406981721 + 10490470929 = 49061^2 + 102423^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12897452594 and 12897452603.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2111287 + ... + 2117386.

Almost surely, 2^12897452650 is an apocalyptic number.

12897452650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12897452650 is a deficient number, since it is larger than the sum of its proper divisors (11485081634).

12897452650 is a wasteful number, since it uses less digits than its factorization.

12897452650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4228746 (or 4228741 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 49.

The spelling of 12897452650 in words is "twelve billion, eight hundred ninety-seven million, four hundred fifty-two thousand, six hundred fifty".