6380912640 has 136 divisors (see below), whose sum is σ = 20421910368. Its totient is φ = 1701314560.

The previous prime is 6380912627. The next prime is 6380912677. The reversal of 6380912640 is 462190836.

It is a super-2 number, since 2×6380912640² = 81432092238623539200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 979795 + ... + 986285.

Almost surely, 2^6380912640 is an apocalyptic number.

6380912640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6380912640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10210955184).

6380912640 is an abundant number, since it is smaller than the sum of its proper divisors (14040997728).

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

6380912640 is an frugal number, since it uses more digits than its factorization.

6380912640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6531 (or 6501 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 6380912640 is about 79880.6149200167. The cubic root of 6380912640 is about 1854.7879522122.

The spelling of 6380912640 in words is "six billion, three hundred eighty million, nine hundred twelve thousand, six hundred forty".