7793991644 has 12 divisors (see below), whose sum is σ = 13669866000. Its totient is φ = 3888315648.

The previous prime is 7793991641. The next prime is 7793991659. The reversal of 7793991644 is 4461993977.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7793991641) 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, 2168024 + ... + 2171615.

It is an arithmetic number, because the mean of its divisors is an integer number (1139155500).

Almost surely, 2^7793991644 is an apocalyptic number.

It is an amenable number.

7793991644 is a deficient number, since it is larger than the sum of its proper divisors (5875874356).

7793991644 is a wasteful number, since it uses less digits than its factorization.

7793991644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4340092 (or 4340090 counting only the distinct ones).

The product of its digits is 10287648, while the sum is 59.

The square root of 7793991644 is about 88283.5864926205. The cubic root of 7793991644 is about 1982.6831327948.

The spelling of 7793991644 in words is "seven billion, seven hundred ninety-three million, nine hundred ninety-one thousand, six hundred forty-four".