638263200132 has 36 divisors (see below), whose sum is σ = 1614608991996. Its totient is φ = 212593328640.

The previous prime is 638263200079. The next prime is 638263200181. The reversal of 638263200132 is 231002362836.

It is a happy number.

638263200132 is a `hidden beast` number, since 6 + 3 + 8 + 2 + 632 + 0 + 0 + 13 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 550068455556 + 88194744576 = 741666^2 + 296976^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6663093 + ... + 6758204.

Almost surely, 2^638263200132 is an apocalyptic number.

It is an amenable number.

638263200132 is an abundant number, since it is smaller than the sum of its proper divisors (976345791864).

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

638263200132 is a wasteful number, since it uses less digits than its factorization.

638263200132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13422628 (or 13422623 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

Adding to 638263200132 its reverse (231002362836), we get a palindrome (869265562968).

The spelling of 638263200132 in words is "six hundred thirty-eight billion, two hundred sixty-three million, two hundred thousand, one hundred thirty-two".