40400422897 has 2 divisors, whose sum is σ = 40400422898. Its totient is φ = 40400422896.

The previous prime is 40400422879. The next prime is 40400422903. The reversal of 40400422897 is 79822400404.

Together with previous prime (40400422879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37502646336 + 2897776561 = 193656^2 + 53831^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40400422897 is a prime.

It is not a weakly prime, because it can be changed into another prime (40400422597) 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 as a sum of consecutive naturals, namely, 20200211448 + 20200211449.

It is an arithmetic number, because the mean of its divisors is an integer number (20200211449).

Almost surely, 2^40400422897 is an apocalyptic number.

It is an amenable number.

40400422897 is a deficient number, since it is larger than the sum of its proper divisors (1).

40400422897 is an equidigital number, since it uses as much as digits as its factorization.

40400422897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129024, while the sum is 40.

The spelling of 40400422897 in words is "forty billion, four hundred million, four hundred twenty-two thousand, eight hundred ninety-seven".