3640018185641 has 8 divisors (see below), whose sum is σ = 3690586415304. Its totient is φ = 3589469009280.

The previous prime is 3640018185623. The next prime is 3640018185667. The reversal of 3640018185641 is 1465818100463.

It can be written as a sum of positive squares in 4 ways, for example, as 347898249241 + 3292119936400 = 589829^2 + 1814420^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3640018185641 - 2³⁴ = 3622838316457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3640018185241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4378370 + ... + 5142971.

It is an arithmetic number, because the mean of its divisors is an integer number (461323301913).

Almost surely, 2^{3640018185641} is an apocalyptic number.

It is an amenable number.

3640018185641 is a deficient number, since it is larger than the sum of its proper divisors (50568229663).

3640018185641 is an equidigital number, since it uses as much as digits as its factorization.

3640018185641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9526651.

The product of its (nonzero) digits is 552960, while the sum is 47.

The spelling of 3640018185641 in words is "three trillion, six hundred forty billion, eighteen million, one hundred eighty-five thousand, six hundred forty-one".