3640641967 has 2 divisors, whose sum is σ = 3640641968. Its totient is φ = 3640641966.

The previous prime is 3640641959. The next prime is 3640641989. The reversal of 3640641967 is 7691460463.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3640641967 - 2³ = 3640641959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3640641997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1820320983 + 1820320984.

It is an arithmetic number, because the mean of its divisors is an integer number (1820320984).

Almost surely, 2^3640641967 is an apocalyptic number.

3640641967 is a deficient number, since it is larger than the sum of its proper divisors (1).

3640641967 is an equidigital number, since it uses as much as digits as its factorization.

3640641967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 46.

The square root of 3640641967 is about 60337.7325311451. The cubic root of 3640641967 is about 1538.3647632394.

The spelling of 3640641967 in words is "three billion, six hundred forty million, six hundred forty-one thousand, nine hundred sixty-seven".