1640440203163 has 8 divisors (see below), whose sum is σ = 1737049220208. Its totient is φ = 1543843689984.

The previous prime is 1640440203161. The next prime is 1640440203187. The reversal of 1640440203163 is 3613020440461.

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 1640440203163 - 2¹ = 1640440203161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1640440203161) 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, 2855181 + ... + 3381262.

It is an arithmetic number, because the mean of its divisors is an integer number (217131152526).

Almost surely, 2^{1640440203163} is an apocalyptic number.

1640440203163 is a deficient number, since it is larger than the sum of its proper divisors (96609017045).

1640440203163 is a wasteful number, since it uses less digits than its factorization.

1640440203163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6251933.

The product of its (nonzero) digits is 41472, while the sum is 34.

The spelling of 1640440203163 in words is "one trillion, six hundred forty billion, four hundred forty million, two hundred three thousand, one hundred sixty-three".