3643401668 has 12 divisors (see below), whose sum is σ = 6376584060. Its totient is φ = 1821520512.

The previous prime is 3643401647. The next prime is 3643401691. The reversal of 3643401668 is 8661043463.

3643401668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3553113664 + 90288004 = 59608^2 + 9502^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7088 + ... + 85656.

It is an arithmetic number, because the mean of its divisors is an integer number (531382005).

Almost surely, 2^3643401668 is an apocalyptic number.

It is an amenable number.

3643401668 is a deficient number, since it is larger than the sum of its proper divisors (2733182392).

3643401668 is a wasteful number, since it uses less digits than its factorization.

3643401668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90166 (or 90164 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 41.

The square root of 3643401668 is about 60360.5969818059. The cubic root of 3643401668 is about 1538.7533718558.

The spelling of 3643401668 in words is "three billion, six hundred forty-three million, four hundred one thousand, six hundred sixty-eight".