2158771260 has 192 divisors, whose sum is σ = 6685701120. Its totient is φ = 518031360.

The previous prime is 2158771247. The next prime is 2158771271. The reversal of 2158771260 is 621778512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7367674 + ... + 7367966.

It is an arithmetic number, because the mean of its divisors is an integer number (34821360).

Almost surely, 2^2158771260 is an apocalyptic number.

2158771260 is a gapful number since it is divisible by the number (20) 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 2158771260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3342850560).

2158771260 is an abundant number, since it is smaller than the sum of its proper divisors (4526929860).

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

2158771260 is a wasteful number, since it uses less digits than its factorization.

2158771260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628 (or 626 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 39.

The square root of 2158771260 is about 46462.5791363329. The cubic root of 2158771260 is about 1292.4156527034.

The spelling of 2158771260 in words is "two billion, one hundred fifty-eight million, seven hundred seventy-one thousand, two hundred sixty".