39436568121 has 4 divisors (see below), whose sum is σ = 52582090832. Its totient is φ = 26291045412.

The previous prime is 39436568107. The next prime is 39436568167. The reversal of 39436568121 is 12186563493.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 39436568121 - 2⁵ = 39436568089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39436568021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6572761351 + ... + 6572761356.

It is an arithmetic number, because the mean of its divisors is an integer number (13145522708).

Almost surely, 2^39436568121 is an apocalyptic number.

It is an amenable number.

39436568121 is a deficient number, since it is larger than the sum of its proper divisors (13145522711).

39436568121 is a wasteful number, since it uses less digits than its factorization.

39436568121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13145522710.

The product of its digits is 933120, while the sum is 48.

The spelling of 39436568121 in words is "thirty-nine billion, four hundred thirty-six million, five hundred sixty-eight thousand, one hundred twenty-one".