402400671255 has 64 divisors (see below), whose sum is σ = 780702451200. Its totient is φ = 195031100160.

The previous prime is 402400671187. The next prime is 402400671269. The reversal of 402400671255 is 552176004204.

It is a happy number.

It is not a de Polignac number, because 402400671255 - 2³⁵ = 368040932887 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4075056 + ... + 4172634.

It is an arithmetic number, because the mean of its divisors is an integer number (12198475800).

Almost surely, 2^402400671255 is an apocalyptic number.

402400671255 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

402400671255 is a deficient number, since it is larger than the sum of its proper divisors (378301779945).

402400671255 is a wasteful number, since it uses less digits than its factorization.

402400671255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100381 (or 100375 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

Adding to 402400671255 its reverse (552176004204), we get a palindrome (954576675459).

The spelling of 402400671255 in words is "four hundred two billion, four hundred million, six hundred seventy-one thousand, two hundred fifty-five".