638862999246 has 24 divisors (see below), whose sum is σ = 1393019751864. Its totient is φ = 211597935120.

The previous prime is 638862999233. The next prime is 638862999253. The reversal of 638862999246 is 642999268836.

It is a congruent number.

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, 113030260 + ... + 113035911.

It is an arithmetic number, because the mean of its divisors is an integer number (58042489661).

Almost surely, 2^638862999246 is an apocalyptic number.

638862999246 is an abundant number, since it is smaller than the sum of its proper divisors (754156752618).

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

638862999246 is a wasteful number, since it uses less digits than its factorization.

638862999246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226066336 (or 226066333 counting only the distinct ones).

The product of its digits is 483729408, while the sum is 72.

The spelling of 638862999246 in words is "six hundred thirty-eight billion, eight hundred sixty-two million, nine hundred ninety-nine thousand, two hundred forty-six".