2165435653 has 16 divisors (see below), whose sum is σ = 2287042560. Its totient is φ = 2047230000.

The previous prime is 2165435651. The next prime is 2165435659. The reversal of 2165435653 is 3565345612.

It is a cyclic number.

It is not a de Polignac number, because 2165435653 - 2¹ = 2165435651 is a prime.

It is a super-2 number, since 2×2165435653² = 9378223134567072818, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165435651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1093218 + ... + 1095196.

It is an arithmetic number, because the mean of its divisors is an integer number (142940160).

Almost surely, 2^2165435653 is an apocalyptic number.

It is an amenable number.

2165435653 is a deficient number, since it is larger than the sum of its proper divisors (121606907).

2165435653 is a wasteful number, since it uses less digits than its factorization.

2165435653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2808.

The product of its digits is 324000, while the sum is 40.

The square root of 2165435653 is about 46534.2417258517. The cubic root of 2165435653 is about 1293.7442352875.

The spelling of 2165435653 in words is "two billion, one hundred sixty-five million, four hundred thirty-five thousand, six hundred fifty-three".