40400040407 has 2 divisors, whose sum is σ = 40400040408. Its totient is φ = 40400040406.

The previous prime is 40400040361. The next prime is 40400040409. The reversal of 40400040407 is 70404000404.

40400040407 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40400040407 - 2⁸ = 40400040151 is a prime.

Together with 40400040409, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40400040409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20200020203 + 20200020204.

It is an arithmetic number, because the mean of its divisors is an integer number (20200020204).

Almost surely, 2^40400040407 is an apocalyptic number.

40400040407 is a deficient number, since it is larger than the sum of its proper divisors (1).

40400040407 is an equidigital number, since it uses as much as digits as its factorization.

40400040407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1792, while the sum is 23.

The spelling of 40400040407 in words is "forty billion, four hundred million, forty thousand, four hundred seven".