638615342024 has 48 divisors (see below), whose sum is σ = 1358611215360. Its totient is φ = 280915826400.

The previous prime is 638615341979. The next prime is 638615342077. The reversal of 638615342024 is 420243516836.

It is a Harshad number since it is a multiple of its sum of digits (44).

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 11 ways as a sum of consecutive naturals, for example, 10610744 + ... + 10670759.

It is an arithmetic number, because the mean of its divisors is an integer number (28304400320).

Almost surely, 2^638615342024 is an apocalyptic number.

It is an amenable number.

638615342024 is an abundant number, since it is smaller than the sum of its proper divisors (719995873336).

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

638615342024 is a wasteful number, since it uses less digits than its factorization.

638615342024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21281562 (or 21281547 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 44.

The spelling of 638615342024 in words is "six hundred thirty-eight billion, six hundred fifteen million, three hundred forty-two thousand, twenty-four".