2165460365 has 4 divisors (see below), whose sum is σ = 2598552444. Its totient is φ = 1732368288.

The previous prime is 2165460331. The next prime is 2165460377. The reversal of 2165460365 is 5630645612.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 266766889 + 1898693476 = 16333^2 + 43574^2 .

It is a cyclic number.

It is not a de Polignac number, because 2165460365 - 2²⁰ = 2164411789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216546032 + ... + 216546041.

It is an arithmetic number, because the mean of its divisors is an integer number (649638111).

Almost surely, 2^2165460365 is an apocalyptic number.

It is an amenable number.

2165460365 is a deficient number, since it is larger than the sum of its proper divisors (433092079).

2165460365 is an equidigital number, since it uses as much as digits as its factorization.

2165460365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433092078.

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 2165460365 is about 46534.5072499967. The cubic root of 2165460365 is about 1293.7491566814.

The spelling of 2165460365 in words is "two billion, one hundred sixty-five million, four hundred sixty thousand, three hundred sixty-five".