2122720768 has 120 divisors (see below), whose sum is σ = 4969496664. Its totient is φ = 903168000.

The previous prime is 2122720751. The next prime is 2122720771. The reversal of 2122720768 is 8670272212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5293368 + ... + 5293768.

Almost surely, 2^2122720768 is an apocalyptic number.

2122720768 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2122720768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2484748332).

2122720768 is an abundant number, since it is smaller than the sum of its proper divisors (2846775896).

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

2122720768 is an equidigital number, since it uses as much as digits as its factorization.

2122720768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644 (or 621 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 2122720768 is about 46072.9939118352. The cubic root of 2122720768 is about 1285.1809801265.

The spelling of 2122720768 in words is "two billion, one hundred twenty-two million, seven hundred twenty thousand, seven hundred sixty-eight".