2126321646 has 8 divisors (see below), whose sum is σ = 4252643304. Its totient is φ = 708773880.

The previous prime is 2126321633. The next prime is 2126321669. The reversal of 2126321646 is 6461236212.

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

2126321646 is an admirable 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, 177193465 + ... + 177193476.

It is an arithmetic number, because the mean of its divisors is an integer number (531580413).

Almost surely, 2^2126321646 is an apocalyptic number.

2126321646 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2126321646 is a wasteful number, since it uses less digits than its factorization.

2126321646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354386946.

The product of its digits is 20736, while the sum is 33.

The square root of 2126321646 is about 46112.0553217919. The cubic root of 2126321646 is about 1285.9072753089.

Adding to 2126321646 its reverse (6461236212), we get a palindrome (8587557858).

The spelling of 2126321646 in words is "two billion, one hundred twenty-six million, three hundred twenty-one thousand, six hundred forty-six".