22778891045 has 4 divisors (see below), whose sum is σ = 27334669260. Its totient is φ = 18223112832.

The previous prime is 22778891027. The next prime is 22778891053. The reversal of 22778891045 is 54019887722.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7885617601 + 14893273444 = 88801^2 + 122038^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22778891045 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2277889100 + ... + 2277889109.

It is an arithmetic number, because the mean of its divisors is an integer number (6833667315).

Almost surely, 2^22778891045 is an apocalyptic number.

It is an amenable number.

22778891045 is a deficient number, since it is larger than the sum of its proper divisors (4555778215).

22778891045 is an equidigital number, since it uses as much as digits as its factorization.

22778891045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4555778214.

The product of its (nonzero) digits is 2257920, while the sum is 53.

The spelling of 22778891045 in words is "twenty-two billion, seven hundred seventy-eight million, eight hundred ninety-one thousand, forty-five".