40091204161 has 4 divisors (see below), whose sum is σ = 40093631424. Its totient is φ = 40088776900.

The previous prime is 40091204149. The next prime is 40091204203. The reversal of 40091204161 is 16140219004.

40091204161 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40091204161 - 2²⁹ = 39554333249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40091204141) 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, 1188685 + ... + 1221946.

It is an arithmetic number, because the mean of its divisors is an integer number (10023407856).

Almost surely, 2^40091204161 is an apocalyptic number.

It is an amenable number.

40091204161 is a deficient number, since it is larger than the sum of its proper divisors (2427263).

40091204161 is a wasteful number, since it uses less digits than its factorization.

40091204161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2427262.

The product of its (nonzero) digits is 1728, while the sum is 28.

The spelling of 40091204161 in words is "forty billion, ninety-one million, two hundred four thousand, one hundred sixty-one".