40031279439 has 4 divisors (see below), whose sum is σ = 53375039256. Its totient is φ = 26687519624.

The previous prime is 40031279423. The next prime is 40031279471. The reversal of 40031279439 is 93497213004.

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 40031279439 - 2⁴ = 40031279423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40031279439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40031279479) 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, 6671879904 + ... + 6671879909.

It is an arithmetic number, because the mean of its divisors is an integer number (13343759814).

Almost surely, 2^40031279439 is an apocalyptic number.

40031279439 is a deficient number, since it is larger than the sum of its proper divisors (13343759817).

40031279439 is a wasteful number, since it uses less digits than its factorization.

40031279439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13343759816.

The product of its (nonzero) digits is 163296, while the sum is 42.

The spelling of 40031279439 in words is "forty billion, thirty-one million, two hundred seventy-nine thousand, four hundred thirty-nine".