6404101901 has 2 divisors, whose sum is σ = 6404101902. Its totient is φ = 6404101900.

The previous prime is 6404101877. The next prime is 6404101903. The reversal of 6404101901 is 1091014046.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6376022500 + 28079401 = 79850^2 + 5299^2 .

It is a cyclic number.

It is not a de Polignac number, because 6404101901 - 2²² = 6399907597 is a prime.

It is a Sophie Germain prime.

Together with 6404101903, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6404101903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3202050950 + 3202050951.

It is an arithmetic number, because the mean of its divisors is an integer number (3202050951).

Almost surely, 2^6404101901 is an apocalyptic number.

6404101901 is the 42776-th centered heptagonal number.

It is an amenable number.

6404101901 is a deficient number, since it is larger than the sum of its proper divisors (1).

6404101901 is an equidigital number, since it uses as much as digits as its factorization.

6404101901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 6404101901 is about 80025.6327747554. The cubic root of 6404101901 is about 1857.0321016065.

Adding to 6404101901 its reverse (1091014046), we get a palindrome (7495115947).

The spelling of 6404101901 in words is "six billion, four hundred four million, one hundred one thousand, nine hundred one".