638712025023 has 32 divisors (see below), whose sum is σ = 891333720000. Its totient is φ = 406298934272.

The previous prime is 638712025001. The next prime is 638712025051. The reversal of 638712025023 is 320520217836.

It is a cyclic number.

It is not a de Polignac number, because 638712025023 - 2⁶ = 638712024959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638712025223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16000333 + ... + 16040201.

It is an arithmetic number, because the mean of its divisors is an integer number (27854178750).

Almost surely, 2^638712025023 is an apocalyptic number.

638712025023 is a deficient number, since it is larger than the sum of its proper divisors (252621694977).

638712025023 is a wasteful number, since it uses less digits than its factorization.

638712025023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42059.

The product of its (nonzero) digits is 120960, while the sum is 39.

The spelling of 638712025023 in words is "six hundred thirty-eight billion, seven hundred twelve million, twenty-five thousand, twenty-three".