400040399959 has 2 divisors, whose sum is σ = 400040399960. Its totient is φ = 400040399958.

The previous prime is 400040399953. The next prime is 400040399963. The reversal of 400040399959 is 959993040004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400040399959 - 2²⁷ = 399906182231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400040399953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200020199979 + 200020199980.

It is an arithmetic number, because the mean of its divisors is an integer number (200020199980).

Almost surely, 2^400040399959 is an apocalyptic number.

400040399959 is a deficient number, since it is larger than the sum of its proper divisors (1).

400040399959 is an equidigital number, since it uses as much as digits as its factorization.

400040399959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1574640, while the sum is 52.

It can be divided in two parts, 40004039995 and 9, that added together give a palindrome (40004040004).

The spelling of 400040399959 in words is "four hundred billion, forty million, three hundred ninety-nine thousand, nine hundred fifty-nine".