40009810679 has 4 divisors (see below), whose sum is σ = 40010247576. Its totient is φ = 40009373784.

The previous prime is 40009810669. The next prime is 40009810697. The reversal of 40009810679 is 97601890004.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 40009810679 - 2¹⁶ = 40009745143 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 (40009810669) 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, 22484 + ... + 283769.

It is an arithmetic number, because the mean of its divisors is an integer number (10002561894).

Almost surely, 2^40009810679 is an apocalyptic number.

40009810679 is a deficient number, since it is larger than the sum of its proper divisors (436897).

40009810679 is a wasteful number, since it uses less digits than its factorization.

40009810679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436896.

The product of its (nonzero) digits is 108864, while the sum is 44.

The spelling of 40009810679 in words is "forty billion, nine million, eight hundred ten thousand, six hundred seventy-nine".