40404442191 has 8 divisors (see below), whose sum is σ = 56707989120. Its totient is φ = 25518595032.

The previous prime is 40404442139. The next prime is 40404442219. The reversal of 40404442191 is 19124440404.

It is a happy number.

40404442191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40404442191 - 2⁷ = 40404442063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40404442121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354424875 + ... + 354424988.

It is an arithmetic number, because the mean of its divisors is an integer number (7088498640).

Almost surely, 2^40404442191 is an apocalyptic number.

40404442191 is a deficient number, since it is larger than the sum of its proper divisors (16303546929).

40404442191 is a wasteful number, since it uses less digits than its factorization.

40404442191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708849885.

The product of its (nonzero) digits is 18432, while the sum is 33.

Adding to 40404442191 its reverse (19124440404), we get a palindrome (59528882595).

The spelling of 40404442191 in words is "forty billion, four hundred four million, four hundred forty-two thousand, one hundred ninety-one".