2155786360 has 384 divisors, whose sum is σ = 6590203200. Its totient is φ = 627056640.

The previous prime is 2155786349. The next prime is 2155786361. The reversal of 2155786360 is 636875512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155786361) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 29531284 + ... + 29531356.

Almost surely, 2^2155786360 is an apocalyptic number.

2155786360 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 2155786360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3295101600).

2155786360 is an abundant number, since it is smaller than the sum of its proper divisors (4434416840).

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

2155786360 is a wasteful number, since it uses less digits than its factorization.

2155786360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 43.

The square root of 2155786360 is about 46430.4464764232. The cubic root of 2155786360 is about 1291.8197101674.

The spelling of 2155786360 in words is "two billion, one hundred fifty-five million, seven hundred eighty-six thousand, three hundred sixty".