3640807768 has 16 divisors (see below), whose sum is σ = 7351631280. Its totient is φ = 1680372768.

The previous prime is 3640807757. The next prime is 3640807783. The reversal of 3640807768 is 8677080463.

It is a congruent number.

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, 17503780 + ... + 17503987.

It is an arithmetic number, because the mean of its divisors is an integer number (459476955).

Almost surely, 2^3640807768 is an apocalyptic number.

It is an amenable number.

3640807768 is an abundant number, since it is smaller than the sum of its proper divisors (3710823512).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3640807768 is a wasteful number, since it uses less digits than its factorization.

3640807768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35007786 (or 35007782 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 49.

The square root of 3640807768 is about 60339.1064567582. The cubic root of 3640807768 is about 1538.3881161304.

The spelling of 3640807768 in words is "three billion, six hundred forty million, eight hundred seven thousand, seven hundred sixty-eight".