638633223462 has 16 divisors (see below), whose sum is σ = 1375517712240. Its totient is φ = 196502530272.

The previous prime is 638633223421. The next prime is 638633223551. The reversal of 638633223462 is 264322336836.

It is a happy number.

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, 4093802637 + ... + 4093802792.

It is an arithmetic number, because the mean of its divisors is an integer number (85969857015).

Almost surely, 2^638633223462 is an apocalyptic number.

638633223462 is an abundant number, since it is smaller than the sum of its proper divisors (736884488778).

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

638633223462 is a wasteful number, since it uses less digits than its factorization.

638633223462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8187605447.

The product of its digits is 4478976, while the sum is 48.

The spelling of 638633223462 in words is "six hundred thirty-eight billion, six hundred thirty-three million, two hundred twenty-three thousand, four hundred sixty-two".