2165003653 has 8 divisors (see below), whose sum is σ = 2198661408. Its totient is φ = 2131594704.

The previous prime is 2165003609. The next prime is 2165003657. The reversal of 2165003653 is 3563005612.

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 2165003653 - 2¹³ = 2164995461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165003657) 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, 44626 + ... + 79507.

It is an arithmetic number, because the mean of its divisors is an integer number (274832676).

Almost surely, 2^2165003653 is an apocalyptic number.

It is an amenable number.

2165003653 is a deficient number, since it is larger than the sum of its proper divisors (33657755).

2165003653 is a wasteful number, since it uses less digits than its factorization.

2165003653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124403.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 2165003653 is about 46529.5997511262. The cubic root of 2165003653 is about 1293.6581964529.

The spelling of 2165003653 in words is "two billion, one hundred sixty-five million, three thousand, six hundred fifty-three".