6404002601 has 2 divisors, whose sum is σ = 6404002602. Its totient is φ = 6404002600.

The previous prime is 6404002571. The next prime is 6404002609. The reversal of 6404002601 is 1062004046.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6155971600 + 248031001 = 78460^2 + 15749^2 .

It is a cyclic number.

It is not a de Polignac number, because 6404002601 - 2¹⁸ = 6403740457 is a prime.

It is a super-2 number, since 2×6404002601² = 82022498627229530402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6404002609) 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 as a sum of consecutive naturals, namely, 3202001300 + 3202001301.

It is an arithmetic number, because the mean of its divisors is an integer number (3202001301).

Almost surely, 2^6404002601 is an apocalyptic number.

It is an amenable number.

6404002601 is a deficient number, since it is larger than the sum of its proper divisors (1).

6404002601 is an equidigital number, since it uses as much as digits as its factorization.

6404002601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 6404002601 is about 80025.0123461409. The cubic root of 6404002601 is about 1857.0225033707.

Adding to 6404002601 its reverse (1062004046), we get a palindrome (7466006647).

The spelling of 6404002601 in words is "six billion, four hundred four million, two thousand, six hundred one".