22355777789 has 2 divisors, whose sum is σ = 22355777790. Its totient is φ = 22355777788.

The previous prime is 22355777729. The next prime is 22355777827. The reversal of 22355777789 is 98777755322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21584604889 + 771172900 = 146917^2 + 27770^2 .

It is a cyclic number.

It is not a de Polignac number, because 22355777789 - 2⁸ = 22355777533 is a prime.

It is a super-2 number, since 2×22355777789² (a number of 21 digits) contains 22 as substring.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22355777729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11177888894 + 11177888895.

It is an arithmetic number, because the mean of its divisors is an integer number (11177888895).

Almost surely, 2^22355777789 is an apocalyptic number.

It is an amenable number.

22355777789 is a deficient number, since it is larger than the sum of its proper divisors (1).

22355777789 is an equidigital number, since it uses as much as digits as its factorization.

22355777789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51861600, while the sum is 62.

The spelling of 22355777789 in words is "twenty-two billion, three hundred fifty-five million, seven hundred seventy-seven thousand, seven hundred eighty-nine".