40679399117 has 4 divisors (see below), whose sum is σ = 46490741856. Its totient is φ = 34868056380.

The previous prime is 40679399113. The next prime is 40679399141. The reversal of 40679399117 is 71199397604.

It is a happy number.

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 40679399117 - 2² = 40679399113 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40679399113) 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, 2905671359 + ... + 2905671372.

It is an arithmetic number, because the mean of its divisors is an integer number (11622685464).

Almost surely, 2^40679399117 is an apocalyptic number.

It is an amenable number.

40679399117 is a deficient number, since it is larger than the sum of its proper divisors (5811342739).

40679399117 is an equidigital number, since it uses as much as digits as its factorization.

40679399117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5811342738.

The product of its (nonzero) digits is 2571912, while the sum is 56.

The spelling of 40679399117 in words is "forty billion, six hundred seventy-nine million, three hundred ninety-nine thousand, one hundred seventeen".