39981875579 has 4 divisors (see below), whose sum is σ = 42086184840. Its totient is φ = 37877566320.

The previous prime is 39981875543. The next prime is 39981875587. The reversal of 39981875579 is 97557818993.

39981875579 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39981875579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39981865579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1052154602 + ... + 1052154639.

It is an arithmetic number, because the mean of its divisors is an integer number (10521546210).

Almost surely, 2^39981875579 is an apocalyptic number.

39981875579 is a deficient number, since it is larger than the sum of its proper divisors (2104309261).

39981875579 is a wasteful number, since it uses less digits than its factorization.

39981875579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2104309260.

The product of its digits is 171460800, while the sum is 71.

The spelling of 39981875579 in words is "thirty-nine billion, nine hundred eighty-one million, eight hundred seventy-five thousand, five hundred seventy-nine".