39764936161 has 4 divisors (see below), whose sum is σ = 40068485424. Its totient is φ = 39461386900.

The previous prime is 39764936149. The next prime is 39764936177. The reversal of 39764936161 is 16163946793.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16163946793 = 139 ⋅116287387.

It is a cyclic number.

It is not a de Polignac number, because 39764936161 - 2⁵ = 39764936129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39764934161) 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, 151774435 + ... + 151774696.

It is an arithmetic number, because the mean of its divisors is an integer number (10017121356).

Almost surely, 2^39764936161 is an apocalyptic number.

It is an amenable number.

39764936161 is a deficient number, since it is larger than the sum of its proper divisors (303549263).

39764936161 is a wasteful number, since it uses less digits than its factorization.

39764936161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303549262.

The product of its digits is 4408992, while the sum is 55.

The spelling of 39764936161 in words is "thirty-nine billion, seven hundred sixty-four million, nine hundred thirty-six thousand, one hundred sixty-one".