2126643771 has 8 divisors (see below), whose sum is σ = 3240600064. Its totient is φ = 1215225000.

The previous prime is 2126643769. The next prime is 2126643833. The reversal of 2126643771 is 1773466212.

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

It is not a de Polignac number, because 2126643771 - 2¹ = 2126643769 is a prime.

It is a super-2 number, since 2×2126643771² = 9045227457466200882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2126643721) 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, 50634355 + ... + 50634396.

It is an arithmetic number, because the mean of its divisors is an integer number (405075008).

Almost surely, 2^2126643771 is an apocalyptic number.

2126643771 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2126643771 is a deficient number, since it is larger than the sum of its proper divisors (1113956293).

2126643771 is a wasteful number, since it uses less digits than its factorization.

2126643771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101268761.

The product of its digits is 84672, while the sum is 39.

The square root of 2126643771 is about 46115.5480396796. The cubic root of 2126643771 is about 1285.9722077814.

The spelling of 2126643771 in words is "two billion, one hundred twenty-six million, six hundred forty-three thousand, seven hundred seventy-one".