402256885849 has 12 divisors (see below), whose sum is σ = 503926209444. Its totient is φ = 318269183904.

The previous prime is 402256885843. The next prime is 402256885853. The reversal of 402256885849 is 948588652204.

It can be written as a sum of positive squares in 2 ways, for example, as 234480629824 + 167776256025 = 484232^2 + 409605^2 .

It is not a de Polignac number, because 402256885849 - 2¹¹ = 402256883801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (402256885843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 315742602 + ... + 315743875.

It is an arithmetic number, because the mean of its divisors is an integer number (41993850787).

Almost surely, 2^402256885849 is an apocalyptic number.

402256885849 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

402256885849 is a deficient number, since it is larger than the sum of its proper divisors (101669323595).

402256885849 is a wasteful number, since it uses less digits than its factorization.

402256885849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631486504 (or 631486497 counting only the distinct ones).

The product of its (nonzero) digits is 44236800, while the sum is 61.

The spelling of 402256885849 in words is "four hundred two billion, two hundred fifty-six million, eight hundred eighty-five thousand, eight hundred forty-nine".