40400000791 has 4 divisors (see below), whose sum is σ = 40406997400. Its totient is φ = 40393004184.

The previous prime is 40400000783. The next prime is 40400000813. The reversal of 40400000791 is 19700000404.

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 40400000791 - 2³ = 40400000783 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 (40400000491) 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, 3489636 + ... + 3501193.

It is an arithmetic number, because the mean of its divisors is an integer number (10101749350).

Almost surely, 2^40400000791 is an apocalyptic number.

40400000791 is a deficient number, since it is larger than the sum of its proper divisors (6996609).

40400000791 is an equidigital number, since it uses as much as digits as its factorization.

40400000791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6996608.

The product of its (nonzero) digits is 1008, while the sum is 25.

The spelling of 40400000791 in words is "forty billion, four hundred million, seven hundred ninety-one", and thus it is an aban number.