3640185820319 has 2 divisors, whose sum is σ = 3640185820320. Its totient is φ = 3640185820318.

The previous prime is 3640185820301. The next prime is 3640185820393. The reversal of 3640185820319 is 9130285810463.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3640185820319 is a prime.

It is a super-2 number, since 2×3640185820319² (a number of 26 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3640185220319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1820092910159 + 1820092910160.

It is an arithmetic number, because the mean of its divisors is an integer number (1820092910160).

Almost surely, 2^{3640185820319} is an apocalyptic number.

3640185820319 is a deficient number, since it is larger than the sum of its proper divisors (1).

3640185820319 is an equidigital number, since it uses as much as digits as its factorization.

3640185820319 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1244160, while the sum is 50.

The spelling of 3640185820319 in words is "three trillion, six hundred forty billion, one hundred eighty-five million, eight hundred twenty thousand, three hundred nineteen".