2165540444503 has 8 divisors (see below), whose sum is σ = 2172179721600. Its totient is φ = 2158903649760.

The previous prime is 2165540444413. The next prime is 2165540444537. The reversal of 2165540444503 is 3054440455612.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2165540444503 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2165540444503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165540444593) 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, 1134426 + ... + 2370232.

It is an arithmetic number, because the mean of its divisors is an integer number (271522465200).

Almost surely, 2^{2165540444503} is an apocalyptic number.

2165540444503 is a deficient number, since it is larger than the sum of its proper divisors (6639277097).

2165540444503 is a wasteful number, since it uses less digits than its factorization.

2165540444503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241177.

The product of its (nonzero) digits is 1152000, while the sum is 43.

The spelling of 2165540444503 in words is "two trillion, one hundred sixty-five billion, five hundred forty million, four hundred forty-four thousand, five hundred three".