638822052748 has 48 divisors (see below), whose sum is σ = 1239751463328. Its totient is φ = 285569856000.

The previous prime is 638822052733. The next prime is 638822052749. The reversal of 638822052748 is 847250228836.

638822052748 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (638822052749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23017536 + ... + 23045272.

It is an arithmetic number, because the mean of its divisors is an integer number (25828155486).

Almost surely, 2^638822052748 is an apocalyptic number.

It is an amenable number.

638822052748 is a deficient number, since it is larger than the sum of its proper divisors (600929410580).

638822052748 is a wasteful number, since it uses less digits than its factorization.

638822052748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36394 (or 36392 counting only the distinct ones).

The product of its (nonzero) digits is 10321920, while the sum is 55.

The spelling of 638822052748 in words is "six hundred thirty-eight billion, eight hundred twenty-two million, fifty-two thousand, seven hundred forty-eight".