3644920901 has 2 divisors, whose sum is σ = 3644920902. Its totient is φ = 3644920900.

The previous prime is 3644920891. The next prime is 3644920907. The reversal of 3644920901 is 1090294463.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3251850625 + 393070276 = 57025^2 + 19826^2 .

It is a cyclic number.

It is not a de Polignac number, because 3644920901 - 2¹⁴ = 3644904517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3644920907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1822460450 + 1822460451.

It is an arithmetic number, because the mean of its divisors is an integer number (1822460451).

Almost surely, 2^3644920901 is an apocalyptic number.

It is an amenable number.

3644920901 is a deficient number, since it is larger than the sum of its proper divisors (1).

3644920901 is an equidigital number, since it uses as much as digits as its factorization.

3644920901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 3644920901 is about 60373.1803121220. The cubic root of 3644920901 is about 1538.9672196332.

The spelling of 3644920901 in words is "three billion, six hundred forty-four million, nine hundred twenty thousand, nine hundred one".