22777889921987 has 2 divisors, whose sum is σ = 22777889921988. Its totient is φ = 22777889921986.

The previous prime is 22777889921959. The next prime is 22777889922023. The reversal of 22777889921987 is 78912998877722.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22777889921987 - 2¹⁰ = 22777889920963 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22777889921899 and 22777889921908.

It is not a weakly prime, because it can be changed into another prime (22777889921387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11388944960993 + 11388944960994.

It is an arithmetic number, because the mean of its divisors is an integer number (11388944960994).

Almost surely, 2^{22777889921987} is an apocalyptic number.

22777889921987 is a deficient number, since it is larger than the sum of its proper divisors (1).

22777889921987 is an equidigital number, since it uses as much as digits as its factorization.

22777889921987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7169347584, while the sum is 86.

The spelling of 22777889921987 in words is "twenty-two trillion, seven hundred seventy-seven billion, eight hundred eighty-nine million, nine hundred twenty-one thousand, nine hundred eighty-seven".