3640808756 has 12 divisors (see below), whose sum is σ = 6861524292. Its totient is φ = 1680373248.

The previous prime is 3640808749. The next prime is 3640808761. The reversal of 3640808756 is 6578080463.

It can be written as a sum of positive squares in 2 ways, for example, as 612067600 + 3028741156 = 24740^2 + 55034^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3640808756.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35007725 + ... + 35007828.

It is an arithmetic number, because the mean of its divisors is an integer number (571793691).

Almost surely, 2^3640808756 is an apocalyptic number.

It is an amenable number.

3640808756 is a deficient number, since it is larger than the sum of its proper divisors (3220715536).

3640808756 is a wasteful number, since it uses less digits than its factorization.

3640808756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70015570 (or 70015568 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 47.

The square root of 3640808756 is about 60339.1146438196. The cubic root of 3640808756 is about 1538.3882552870.

The spelling of 3640808756 in words is "three billion, six hundred forty million, eight hundred eight thousand, seven hundred fifty-six".