12640452630 has 64 divisors (see below), whose sum is σ = 33064416000. Its totient is φ = 3074000256.

The previous prime is 12640452571. The next prime is 12640452653. The reversal of 12640452630 is 3625404621.

It is a junction number, because it is equal to n+sod(n) for n = 12640452591 and 12640452600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 162880 + ... + 227619.

It is an arithmetic number, because the mean of its divisors is an integer number (516631500).

Almost surely, 2^12640452630 is an apocalyptic number.

12640452630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12640452630 is an abundant number, since it is smaller than the sum of its proper divisors (20423963370).

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

12640452630 is a wasteful number, since it uses less digits than its factorization.

12640452630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390605.

The product of its (nonzero) digits is 34560, while the sum is 33.

The spelling of 12640452630 in words is "twelve billion, six hundred forty million, four hundred fifty-two thousand, six hundred thirty".