3640018185640 has 16 divisors (see below), whose sum is σ = 8190040917780. Its totient is φ = 1456007274240.

The previous prime is 3640018185623. The next prime is 3640018185667. The reversal of 3640018185640 is 465818100463.

It can be written as a sum of positive squares in 2 ways, for example, as 3423809925316 + 216208260324 = 1850354^2 + 464982^2 .

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, 45500227281 + ... + 45500227360.

Almost surely, 2^{3640018185640} is an apocalyptic number.

It is an amenable number.

3640018185640 is an abundant number, since it is smaller than the sum of its proper divisors (4550022732140).

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

3640018185640 is a wasteful number, since it uses less digits than its factorization.

3640018185640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91000454652 (or 91000454648 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 46.

The spelling of 3640018185640 in words is "three trillion, six hundred forty billion, eighteen million, one hundred eighty-five thousand, six hundred forty".