38644425999 has 20 divisors (see below), whose sum is σ = 57753677520. Its totient is φ = 25751532960.

The previous prime is 38644425961. The next prime is 38644426019. The reversal of 38644425999 is 99952444683.

38644425999 is a `hidden beast` number, since 3 + 86 + 44 + 425 + 9 + 99 = 666.

It is not a de Polignac number, because 38644425999 - 2²⁵ = 38610871567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38644425929) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 80182 + ... + 289340.

It is an arithmetic number, because the mean of its divisors is an integer number (2887683876).

Almost surely, 2^38644425999 is an apocalyptic number.

38644425999 is a deficient number, since it is larger than the sum of its proper divisors (19109251521).

38644425999 is a wasteful number, since it uses less digits than its factorization.

38644425999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211452 (or 211443 counting only the distinct ones).

The product of its digits is 67184640, while the sum is 63.

The spelling of 38644425999 in words is "thirty-eight billion, six hundred forty-four million, four hundred twenty-five thousand, nine hundred ninety-nine".