400460420639 has 2 divisors, whose sum is σ = 400460420640. Its totient is φ = 400460420638.

The previous prime is 400460420621. The next prime is 400460420699. The reversal of 400460420639 is 936024064004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400460420639 - 2²⁰ = 400459372063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400460420699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200230210319 + 200230210320.

It is an arithmetic number, because the mean of its divisors is an integer number (200230210320).

Almost surely, 2^400460420639 is an apocalyptic number.

400460420639 is a deficient number, since it is larger than the sum of its proper divisors (1).

400460420639 is an equidigital number, since it uses as much as digits as its factorization.

400460420639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 38.

The spelling of 400460420639 in words is "four hundred billion, four hundred sixty million, four hundred twenty thousand, six hundred thirty-nine".