2165426634 has 16 divisors (see below), whose sum is σ = 4949546688. Its totient is φ = 618693312.

The previous prime is 2165426633. The next prime is 2165426647. The reversal of 2165426634 is 4366245612.

It is a junction number, because it is equal to n+sod(n) for n = 2165426592 and 2165426601.

It is not an unprimeable number, because it can be changed into a prime (2165426633) 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, 25778847 + ... + 25778930.

It is an arithmetic number, because the mean of its divisors is an integer number (309346668).

Almost surely, 2^2165426634 is an apocalyptic number.

2165426634 is an abundant number, since it is smaller than the sum of its proper divisors (2784120054).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2165426634 is a wasteful number, since it uses less digits than its factorization.

2165426634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51557789.

The product of its digits is 207360, while the sum is 39.

The square root of 2165426634 is about 46534.1448186168. The cubic root of 2165426634 is about 1293.7424391446.

The spelling of 2165426634 in words is "two billion, one hundred sixty-five million, four hundred twenty-six thousand, six hundred thirty-four".