402256915477 has 2 divisors, whose sum is σ = 402256915478. Its totient is φ = 402256915476.

The previous prime is 402256915433. The next prime is 402256915481. The reversal of 402256915477 is 774519652204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 278489453841 + 123767461636 = 527721^2 + 351806^2 .

It is a cyclic number.

It is not a de Polignac number, because 402256915477 - 2⁷ = 402256915349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402256915427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201128457738 + 201128457739.

It is an arithmetic number, because the mean of its divisors is an integer number (201128457739).

Almost surely, 2^402256915477 is an apocalyptic number.

It is an amenable number.

402256915477 is a deficient number, since it is larger than the sum of its proper divisors (1).

402256915477 is an equidigital number, since it uses as much as digits as its factorization.

402256915477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4233600, while the sum is 52.

The spelling of 402256915477 in words is "four hundred two billion, two hundred fifty-six million, nine hundred fifteen thousand, four hundred seventy-seven".