12657642490 has 32 divisors (see below), whose sum is σ = 24054189120. Its totient is φ = 4782322944.

The previous prime is 12657642421. The next prime is 12657642523. The reversal of 12657642490 is 9424675621.

It is a self number, because there is not a number n which added to its sum of digits gives 12657642490.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34812 + ... + 162871.

It is an arithmetic number, because the mean of its divisors is an integer number (751693410).

Almost surely, 2^12657642490 is an apocalyptic number.

12657642490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12657642490 is a deficient number, since it is larger than the sum of its proper divisors (11396546630).

12657642490 is a wasteful number, since it uses less digits than its factorization.

12657642490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198046.

The product of its (nonzero) digits is 725760, while the sum is 46.

The spelling of 12657642490 in words is "twelve billion, six hundred fifty-seven million, six hundred forty-two thousand, four hundred ninety".