2320581640 has 32 divisors (see below), whose sum is σ = 5622949080. Its totient is φ = 856829952.

The previous prime is 2320581607. The next prime is 2320581643. The reversal of 2320581640 is 461850232.

It can be written as a sum of positive squares in 4 ways, for example, as 1877142276 + 443439364 = 43326^2 + 21058^2 .

It is not an unprimeable number, because it can be changed into a prime (2320581643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2230809 + ... + 2231848.

Almost surely, 2^2320581640 is an apocalyptic number.

2320581640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2320581640 is an abundant number, since it is smaller than the sum of its proper divisors (3302367440).

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

2320581640 is a wasteful number, since it uses less digits than its factorization.

2320581640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4462681 (or 4462677 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 2320581640 is about 48172.4157583985. The cubic root of 2320581640 is about 1323.9318107286.

The spelling of 2320581640 in words is "two billion, three hundred twenty million, five hundred eighty-one thousand, six hundred forty".