2164731798 has 32 divisors (see below), whose sum is σ = 4523000832. Its totient is φ = 689882400.

The previous prime is 2164731787. The next prime is 2164731799. The reversal of 2164731798 is 8971374612.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2164731799) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54673 + ... + 85548.

It is an arithmetic number, because the mean of its divisors is an integer number (141343776).

Almost surely, 2^2164731798 is an apocalyptic number.

2164731798 is an abundant number, since it is smaller than the sum of its proper divisors (2358269034).

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

2164731798 is a wasteful number, since it uses less digits than its factorization.

2164731798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140340.

The product of its digits is 508032, while the sum is 48.

The square root of 2164731798 is about 46526.6783469441. The cubic root of 2164731798 is about 1293.6040468644.

The spelling of 2164731798 in words is "two billion, one hundred sixty-four million, seven hundred thirty-one thousand, seven hundred ninety-eight".