6404100281 has 2 divisors, whose sum is σ = 6404100282. Its totient is φ = 6404100280.

The previous prime is 6404100257. The next prime is 6404100301. The reversal of 6404100281 is 1820014046.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5287471225 + 1116629056 = 72715^2 + 33416^2 .

It is a cyclic number.

It is not a de Polignac number, because 6404100281 - 2¹⁴ = 6404083897 is a prime.

It is a super-2 number, since 2×6404100281² = 82025000818208557922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6404100281.

It is not a weakly prime, because it can be changed into another prime (6404100221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3202050140 + 3202050141.

It is an arithmetic number, because the mean of its divisors is an integer number (3202050141).

Almost surely, 2^6404100281 is an apocalyptic number.

It is an amenable number.

6404100281 is a deficient number, since it is larger than the sum of its proper divisors (1).

6404100281 is an equidigital number, since it uses as much as digits as its factorization.

6404100281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 6404100281 is about 80025.6226529978. The cubic root of 6404100281 is about 1857.0319450198.

The spelling of 6404100281 in words is "six billion, four hundred four million, one hundred thousand, two hundred eighty-one".