7638643311744 has 32 divisors (see below), whose sum is σ = 20290146297840. Its totient is φ = 2546214437120.

The previous prime is 7638643311701. The next prime is 7638643311773. The reversal of 7638643311744 is 4471133468367.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9946149762 + ... + 9946150529.

Almost surely, 2^{7638643311744} is an apocalyptic number.

It is an amenable number.

7638643311744 is an abundant number, since it is smaller than the sum of its proper divisors (12651502986096).

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

7638643311744 is a wasteful number, since it uses less digits than its factorization.

7638643311744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19892300308 (or 19892300296 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 57.

The spelling of 7638643311744 in words is "seven trillion, six hundred thirty-eight billion, six hundred forty-three million, three hundred eleven thousand, seven hundred forty-four".