2245640891 has 16 divisors (see below), whose sum is σ = 2563493184. Its totient is φ = 1948790784.

The previous prime is 2245640869. The next prime is 2245640921. The reversal of 2245640891 is 1980465422.

It is not a de Polignac number, because 2245640891 - 2⁶ = 2245640827 is a prime.

It is a super-2 number, since 2×2245640891² = 10085806022662547762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2245640821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212075 + ... + 222411.

It is an arithmetic number, because the mean of its divisors is an integer number (160218324).

Almost surely, 2^2245640891 is an apocalyptic number.

2245640891 is a deficient number, since it is larger than the sum of its proper divisors (317852293).

2245640891 is a wasteful number, since it uses less digits than its factorization.

2245640891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11350.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 2245640891 is about 47388.1935823682. The cubic root of 2245640891 is about 1309.5239205888.

The spelling of 2245640891 in words is "two billion, two hundred forty-five million, six hundred forty thousand, eight hundred ninety-one".