402256475779 has 2 divisors, whose sum is σ = 402256475780. Its totient is φ = 402256475778.

The previous prime is 402256475767. The next prime is 402256475801. The reversal of 402256475779 is 977574652204.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402256475779 is a prime.

It is a super-2 number, since 2×402256475779² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (402256475749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201128237889 + 201128237890.

It is an arithmetic number, because the mean of its divisors is an integer number (201128237890).

Almost surely, 2^402256475779 is an apocalyptic number.

402256475779 is a deficient number, since it is larger than the sum of its proper divisors (1).

402256475779 is an equidigital number, since it uses as much as digits as its factorization.

402256475779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29635200, while the sum is 58.

The spelling of 402256475779 in words is "four hundred two billion, two hundred fifty-six million, four hundred seventy-five thousand, seven hundred seventy-nine".