22245555779 has 4 divisors (see below), whose sum is σ = 22249808784. Its totient is φ = 22241302776.

The previous prime is 22245555659. The next prime is 22245555781. The reversal of 22245555779 is 97755554222.

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

It is a cyclic number.

It is not a de Polignac number, because 22245555779 - 2⁸ = 22245555523 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 22245555779.

It is not an unprimeable number, because it can be changed into a prime (22245555979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2118647 + ... + 2129120.

It is an arithmetic number, because the mean of its divisors is an integer number (5562452196).

Almost surely, 2^22245555779 is an apocalyptic number.

22245555779 is a deficient number, since it is larger than the sum of its proper divisors (4253005).

22245555779 is an equidigital number, since it uses as much as digits as its factorization.

22245555779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4253004.

The product of its digits is 8820000, while the sum is 53.

The spelling of 22245555779 in words is "twenty-two billion, two hundred forty-five million, five hundred fifty-five thousand, seven hundred seventy-nine".