2186801864 has 48 divisors (see below), whose sum is σ = 4474174320. Its totient is φ = 1001507520.

The previous prime is 2186801863. The next prime is 2186801887. The reversal of 2186801864 is 4681086812.

It is not an unprimeable number, because it can be changed into a prime (2186801863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 170939 + ... + 183285.

It is an arithmetic number, because the mean of its divisors is an integer number (93211965).

Almost surely, 2^2186801864 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 2186801864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2237087160).

2186801864 is an abundant number, since it is smaller than the sum of its proper divisors (2287372456).

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

2186801864 is a wasteful number, since it uses less digits than its factorization.

2186801864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12510 (or 12493 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 44.

The square root of 2186801864 is about 46763.2533513228. The cubic root of 2186801864 is about 1297.9854129761.

The spelling of 2186801864 in words is "two billion, one hundred eighty-six million, eight hundred one thousand, eight hundred sixty-four".