3640574669809 has 24 divisors (see below), whose sum is σ = 4620631432608. Its totient is φ = 2836393035840.

The previous prime is 3640574669789. The next prime is 3640574669813. The reversal of 3640574669809 is 9089664750463.

3640574669809 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3640574669809 - 2¹⁵ = 3640574637041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3640574669009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3185077 + ... + 4174429.

It is an arithmetic number, because the mean of its divisors is an integer number (192526309692).

Almost surely, 2^{3640574669809} is an apocalyptic number.

It is an amenable number.

3640574669809 is a deficient number, since it is larger than the sum of its proper divisors (980056762799).

3640574669809 is a wasteful number, since it uses less digits than its factorization.

3640574669809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996205 (or 996198 counting only the distinct ones).

The product of its (nonzero) digits is 235146240, while the sum is 67.

The spelling of 3640574669809 in words is "three trillion, six hundred forty billion, five hundred seventy-four million, six hundred sixty-nine thousand, eight hundred nine".