39539579421 has 16 divisors (see below), whose sum is σ = 55841353344. Its totient is φ = 24799916544.

The previous prime is 39539579371. The next prime is 39539579437. The reversal of 39539579421 is 12497593593.

39539579421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 39539579421 - 2⁶ = 39539579357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39539579491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4521 + ... + 281246.

It is an arithmetic number, because the mean of its divisors is an integer number (3490084584).

Almost surely, 2^39539579421 is an apocalyptic number.

It is an amenable number.

39539579421 is a deficient number, since it is larger than the sum of its proper divisors (16301773923).

39539579421 is a wasteful number, since it uses less digits than its factorization.

39539579421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288500.

The product of its digits is 9185400, while the sum is 57.

The spelling of 39539579421 in words is "thirty-nine billion, five hundred thirty-nine million, five hundred seventy-nine thousand, four hundred twenty-one".