638674788007 has 8 divisors (see below), whose sum is σ = 641282434272. Its totient is φ = 636072192000.

The previous prime is 638674788001. The next prime is 638674788023. The reversal of 638674788007 is 700887476836.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-638674788007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 638674788007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638674788001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1009018 + ... + 1515079.

It is an arithmetic number, because the mean of its divisors is an integer number (80160304284).

Almost surely, 2^638674788007 is an apocalyptic number.

638674788007 is a deficient number, since it is larger than the sum of its proper divisors (2607646265).

638674788007 is a wasteful number, since it uses less digits than its factorization.

638674788007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2525129.

The product of its (nonzero) digits is 75866112, while the sum is 64.

The spelling of 638674788007 in words is "six hundred thirty-eight billion, six hundred seventy-four million, seven hundred eighty-eight thousand, seven".