638762512623 has 16 divisors (see below), whose sum is σ = 857021806080. Its totient is φ = 423173139264.

The previous prime is 638762512543. The next prime is 638762512637. The reversal of 638762512623 is 326215267836.

It is not a de Polignac number, because 638762512623 - 2³⁰ = 637688770799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638762512643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3789915 + ... + 3954867.

It is an arithmetic number, because the mean of its divisors is an integer number (53563862880).

Almost surely, 2^638762512623 is an apocalyptic number.

638762512623 is a deficient number, since it is larger than the sum of its proper divisors (218259293457).

638762512623 is a wasteful number, since it uses less digits than its factorization.

638762512623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173038.

The product of its digits is 4354560, while the sum is 51.

The spelling of 638762512623 in words is "six hundred thirty-eight billion, seven hundred sixty-two million, five hundred twelve thousand, six hundred twenty-three".