2158583772 has 72 divisors (see below), whose sum is σ = 5403239296. Its totient is φ = 670516992.

The previous prime is 2158583771. The next prime is 2158583803. The reversal of 2158583772 is 2773858512.

2158583772 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158583771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 354183 + ... + 360225.

Almost surely, 2^2158583772 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 2158583772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2701619648).

2158583772 is an abundant number, since it is smaller than the sum of its proper divisors (3244655524).

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

2158583772 is a wasteful number, since it uses less digits than its factorization.

2158583772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6187 (or 6168 counting only the distinct ones).

The product of its digits is 940800, while the sum is 48.

The square root of 2158583772 is about 46460.5614688415. The cubic root of 2158583772 is about 1292.3782364432.

The spelling of 2158583772 in words is "two billion, one hundred fifty-eight million, five hundred eighty-three thousand, seven hundred seventy-two".