638822035632 has 40 divisors (see below), whose sum is σ = 1800316647360. Its totient is φ = 193582434880.

The previous prime is 638822035603. The next prime is 638822035633. The reversal of 638822035632 is 236530228836.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (638822035633) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 604944582 + ... + 604945637.

It is an arithmetic number, because the mean of its divisors is an integer number (45007916184).

Almost surely, 2^638822035632 is an apocalyptic number.

It is an amenable number.

638822035632 is an abundant number, since it is smaller than the sum of its proper divisors (1161494611728).

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

638822035632 is a wasteful number, since it uses less digits than its factorization.

638822035632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209890241 (or 1209890235 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 48.

The spelling of 638822035632 in words is "six hundred thirty-eight billion, eight hundred twenty-two million, thirty-five thousand, six hundred thirty-two".