3640836768 has 24 divisors (see below), whose sum is σ = 9557196768. Its totient is φ = 1213612224.

The previous prime is 3640836737. The next prime is 3640836779. The reversal of 3640836768 is 8676380463.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 3640836768.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18962596 + ... + 18962787.

It is an arithmetic number, because the mean of its divisors is an integer number (398216532).

Almost surely, 2^3640836768 is an apocalyptic number.

It is an amenable number.

3640836768 is an abundant number, since it is smaller than the sum of its proper divisors (5916360000).

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

3640836768 is a wasteful number, since it uses less digits than its factorization.

3640836768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37925396 (or 37925388 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 51.

The square root of 3640836768 is about 60339.3467647770. The cubic root of 3640836768 is about 1538.3922006760.

The spelling of 3640836768 in words is "three billion, six hundred forty million, eight hundred thirty-six thousand, seven hundred sixty-eight".