2145255568 has 40 divisors (see below), whose sum is σ = 4421904480. Its totient is φ = 1004720640.

The previous prime is 2145255499. The next prime is 2145255569. The reversal of 2145255568 is 8655525412.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2145255569) 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, 38703 + ... + 76081.

It is an arithmetic number, because the mean of its divisors is an integer number (110547612).

Almost surely, 2^2145255568 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 2145255568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2210952240).

2145255568 is an abundant number, since it is smaller than the sum of its proper divisors (2276648912).

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

2145255568 is a wasteful number, since it uses less digits than its factorization.

2145255568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37615 (or 37609 counting only the distinct ones).

The product of its digits is 480000, while the sum is 43.

The square root of 2145255568 is about 46316.9036961669. The cubic root of 2145255568 is about 1289.7128074891.

The spelling of 2145255568 in words is "two billion, one hundred forty-five million, two hundred fifty-five thousand, five hundred sixty-eight".