3648185491 has 2 divisors, whose sum is σ = 3648185492. Its totient is φ = 3648185490.

The previous prime is 3648185479. The next prime is 3648185509. The reversal of 3648185491 is 1945818463.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3648185491 - 2¹¹ = 3648183443 is a prime.

It is a super-2 number, since 2×3648185491² = 26618514753485822162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3648155491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1824092745 + 1824092746.

It is an arithmetic number, because the mean of its divisors is an integer number (1824092746).

Almost surely, 2^3648185491 is an apocalyptic number.

3648185491 is a deficient number, since it is larger than the sum of its proper divisors (1).

3648185491 is an equidigital number, since it uses as much as digits as its factorization.

3648185491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 829440, while the sum is 49.

The square root of 3648185491 is about 60400.2110178433. The cubic root of 3648185491 is about 1539.4265435277.

The spelling of 3648185491 in words is "three billion, six hundred forty-eight million, one hundred eighty-five thousand, four hundred ninety-one".