2921151688 has 128 divisors (see below), whose sum is σ = 6876979200. Its totient is φ = 1132621056.

The previous prime is 2921151683. The next prime is 2921151691. The reversal of 2921151688 is 8861511292.

2921151688 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2921151683) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12222273 + ... + 12222511.

It is an arithmetic number, because the mean of its divisors is an integer number (53726400).

Almost surely, 2^2921151688 is an apocalyptic number.

2921151688 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 2921151688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3438489600).

2921151688 is an abundant number, since it is smaller than the sum of its proper divisors (3955827512).

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

2921151688 is a wasteful number, since it uses less digits than its factorization.

2921151688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531 (or 527 counting only the distinct ones).

The product of its digits is 69120, while the sum is 43.

The square root of 2921151688 is about 54047.6797651851. The cubic root of 2921151688 is about 1429.5017887237.

The spelling of 2921151688 in words is "two billion, nine hundred twenty-one million, one hundred fifty-one thousand, six hundred eighty-eight".