40439393179 has 4 divisors (see below), whose sum is σ = 40439919976. Its totient is φ = 40438866384.

The previous prime is 40439393177. The next prime is 40439393191. The reversal of 40439393179 is 97139393404.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40439393179 - 2¹ = 40439393177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40439393171) 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, 123474 + ... + 310039.

It is an arithmetic number, because the mean of its divisors is an integer number (10109979994).

Almost surely, 2^40439393179 is an apocalyptic number.

40439393179 is a deficient number, since it is larger than the sum of its proper divisors (526797).

40439393179 is an equidigital number, since it uses as much as digits as its factorization.

40439393179 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526796.

The product of its (nonzero) digits is 2204496, while the sum is 52.

The spelling of 40439393179 in words is "forty billion, four hundred thirty-nine million, three hundred ninety-three thousand, one hundred seventy-nine".