12650331640 has 32 divisors (see below), whose sum is σ = 28888076880. Its totient is φ = 4984607232.

The previous prime is 12650331623. The next prime is 12650331641. The reversal of 12650331640 is 4613305621.

It is a super-3 number, since 3×12650331640³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12650331641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2357457 + ... + 2362816.

Almost surely, 2^12650331640 is an apocalyptic number.

12650331640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12650331640 is an abundant number, since it is smaller than the sum of its proper divisors (16237745240).

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

12650331640 is a wasteful number, since it uses less digits than its factorization.

12650331640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4720351 (or 4720347 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The spelling of 12650331640 in words is "twelve billion, six hundred fifty million, three hundred thirty-one thousand, six hundred forty".