402401390647 has 2 divisors, whose sum is σ = 402401390648. Its totient is φ = 402401390646.

The previous prime is 402401390623. The next prime is 402401390669. The reversal of 402401390647 is 746093104204.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402401390647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402401390617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201200695323 + 201200695324.

It is an arithmetic number, because the mean of its divisors is an integer number (201200695324).

Almost surely, 2^402401390647 is an apocalyptic number.

402401390647 is a deficient number, since it is larger than the sum of its proper divisors (1).

402401390647 is an equidigital number, since it uses as much as digits as its factorization.

402401390647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 402401390647 in words is "four hundred two billion, four hundred one million, three hundred ninety thousand, six hundred forty-seven".