38449206639 has 24 divisors (see below), whose sum is σ = 57182634080. Its totient is φ = 24877119168.

The previous prime is 38449206611. The next prime is 38449206647. The reversal of 38449206639 is 93660294483.

It is not a de Polignac number, because 38449206639 - 2⁷ = 38449206511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38449206139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13219 + ... + 277620.

Almost surely, 2^38449206639 is an apocalyptic number.

38449206639 is a deficient number, since it is larger than the sum of its proper divisors (18733427441).

38449206639 is a wasteful number, since it uses less digits than its factorization.

38449206639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291279 (or 291276 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 54.

The spelling of 38449206639 in words is "thirty-eight billion, four hundred forty-nine million, two hundred six thousand, six hundred thirty-nine".