7649191644 has 24 divisors (see below), whose sum is σ = 18150625920. Its totient is φ = 2506514544.

The previous prime is 7649191619. The next prime is 7649191721. The reversal of 7649191644 is 4461919467.

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, 5401264 + ... + 5402679.

It is an arithmetic number, because the mean of its divisors is an integer number (756276080).

Almost surely, 2^7649191644 is an apocalyptic number.

It is an amenable number.

7649191644 is an abundant number, since it is smaller than the sum of its proper divisors (10501434276).

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

7649191644 is a wasteful number, since it uses less digits than its factorization.

7649191644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10804009 (or 10804007 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 51.

The square root of 7649191644 is about 87459.6572369227. The cubic root of 7649191644 is about 1970.3279315287.

The spelling of 7649191644 in words is "seven billion, six hundred forty-nine million, one hundred ninety-one thousand, six hundred forty-four".