7644363640 has 16 divisors (see below), whose sum is σ = 17199818280. Its totient is φ = 3057745440.

The previous prime is 7644363589. The next prime is 7644363647. The reversal of 7644363640 is 463634467.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7644363647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95554506 + ... + 95554585.

Almost surely, 2^7644363640 is an apocalyptic number.

It is an amenable number.

7644363640 is an abundant number, since it is smaller than the sum of its proper divisors (9555454640).

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

7644363640 is a wasteful number, since it uses less digits than its factorization.

7644363640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191109102 (or 191109098 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 43.

The square root of 7644363640 is about 87432.0515600543. The cubic root of 7644363640 is about 1969.9133015175.

The spelling of 7644363640 in words is "seven billion, six hundred forty-four million, three hundred sixty-three thousand, six hundred forty".