2642191816 has 96 divisors (see below), whose sum is σ = 5795586720. Its totient is φ = 1124513280.

The previous prime is 2642191801. The next prime is 2642191829. The reversal of 2642191816 is 6181912462.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5051731 + ... + 5052253.

It is an arithmetic number, because the mean of its divisors is an integer number (60370695).

Almost surely, 2^2642191816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2642191816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2897793360).

2642191816 is an abundant number, since it is smaller than the sum of its proper divisors (3153394904).

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

2642191816 is a wasteful number, since it uses less digits than its factorization.

2642191816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875 (or 860 counting only the distinct ones).

The product of its digits is 41472, while the sum is 40.

The square root of 2642191816 is about 51402.2549699913. The cubic root of 2642191816 is about 1382.4670244482.

The spelling of 2642191816 in words is "two billion, six hundred forty-two million, one hundred ninety-one thousand, eight hundred sixteen".