3640185820393 has 2 divisors, whose sum is σ = 3640185820394. Its totient is φ = 3640185820392.

The previous prime is 3640185820319. The next prime is 3640185820423. The reversal of 3640185820393 is 3930285810463.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2601472216464 + 1038713603929 = 1612908^2 + 1019173^2 .

It is a cyclic number.

It is not a de Polignac number, because 3640185820393 - 2²⁵ = 3640152265961 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3640185820393.

It is not a weakly prime, because it can be changed into another prime (3640185800393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1820092910196 + 1820092910197.

It is an arithmetic number, because the mean of its divisors is an integer number (1820092910197).

Almost surely, 2^{3640185820393} is an apocalyptic number.

It is an amenable number.

3640185820393 is a deficient number, since it is larger than the sum of its proper divisors (1).

3640185820393 is an equidigital number, since it uses as much as digits as its factorization.

3640185820393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3732480, while the sum is 52.

The spelling of 3640185820393 in words is "three trillion, six hundred forty billion, one hundred eighty-five million, eight hundred twenty thousand, three hundred ninety-three".