1638232290624 has 56 divisors (see below), whose sum is σ = 4335065061120. Its totient is φ = 546004931584.

The previous prime is 1638232290553. The next prime is 1638232290671. The reversal of 1638232290624 is 4260922328361.

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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 893332 + ... + 2018540.

Almost surely, 2^{1638232290624} is an apocalyptic number.

It is an amenable number.

1638232290624 is an abundant number, since it is smaller than the sum of its proper divisors (2696832770496).

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

1638232290624 is a wasteful number, since it uses less digits than its factorization.

1638232290624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132807 (or 1132797 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 48.

The spelling of 1638232290624 in words is "one trillion, six hundred thirty-eight billion, two hundred thirty-two million, two hundred ninety thousand, six hundred twenty-four".