21774565448659 has 2 divisors, whose sum is σ = 21774565448660. Its totient is φ = 21774565448658.

The previous prime is 21774565448639. The next prime is 21774565448663. The reversal of 21774565448659 is 95684456547712.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21774565448659 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21774565448591 and 21774565448600.

It is not a weakly prime, because it can be changed into another prime (21774565448639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10887282724329 + 10887282724330.

It is an arithmetic number, because the mean of its divisors is an integer number (10887282724330).

Almost surely, 2^{21774565448659} is an apocalyptic number.

21774565448659 is a deficient number, since it is larger than the sum of its proper divisors (1).

21774565448659 is an equidigital number, since it uses as much as digits as its factorization.

21774565448659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128000, while the sum is 73.

The spelling of 21774565448659 in words is "twenty-one trillion, seven hundred seventy-four billion, five hundred sixty-five million, four hundred forty-eight thousand, six hundred fifty-nine".