39642689879 has 8 divisors (see below), whose sum is σ = 43232535360. Its totient is φ = 36130045536.

The previous prime is 39642689873. The next prime is 39642689971. The reversal of 39642689879 is 97898624693.

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

It is not a de Polignac number, because 39642689879 - 2¹² = 39642685783 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 (39642689873) 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, 19299212 + ... + 19301265.

It is an arithmetic number, because the mean of its divisors is an integer number (5404066920).

Almost surely, 2^39642689879 is an apocalyptic number.

39642689879 is a deficient number, since it is larger than the sum of its proper divisors (3589845481).

39642689879 is a wasteful number, since it uses less digits than its factorization.

39642689879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38600569.

The product of its digits is 282175488, while the sum is 71.

The spelling of 39642689879 in words is "thirty-nine billion, six hundred forty-two million, six hundred eighty-nine thousand, eight hundred seventy-nine".