7644646040 has 16 divisors (see below), whose sum is σ = 17200453680. Its totient is φ = 3057858400.

The previous prime is 7644645947. The next prime is 7644646063. The reversal of 7644646040 is 406464467.

It is a super-2 number, since 2×7644646040² (a number of 21 digits) 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 3 ways as a sum of consecutive naturals, for example, 95558036 + ... + 95558115.

It is an arithmetic number, because the mean of its divisors is an integer number (1075028355).

Almost surely, 2^7644646040 is an apocalyptic number.

It is an amenable number.

7644646040 is an abundant number, since it is smaller than the sum of its proper divisors (9555807640).

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

7644646040 is a wasteful number, since it uses less digits than its factorization.

7644646040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191116162 (or 191116158 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 41.

The square root of 7644646040 is about 87433.6665135347. Note that the first 3 decimals coincide. The cubic root of 7644646040 is about 1969.9375588959.

The spelling of 7644646040 in words is "seven billion, six hundred forty-four million, six hundred forty-six thousand, forty".