22173879649 has 2 divisors, whose sum is σ = 22173879650. Its totient is φ = 22173879648.

The previous prime is 22173879613. The next prime is 22173879677. The reversal of 22173879649 is 94697837122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20327630625 + 1846249024 = 142575^2 + 42968^2 .

It is a cyclic number.

It is not a de Polignac number, because 22173879649 - 2⁷ = 22173879521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22173879593 and 22173879602.

It is not a weakly prime, because it can be changed into another prime (22173871649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11086939824 + 11086939825.

It is an arithmetic number, because the mean of its divisors is an integer number (11086939825).

Almost surely, 2^22173879649 is an apocalyptic number.

It is an amenable number.

22173879649 is a deficient number, since it is larger than the sum of its proper divisors (1).

22173879649 is an equidigital number, since it uses as much as digits as its factorization.

22173879649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9144576, while the sum is 58.

The spelling of 22173879649 in words is "twenty-two billion, one hundred seventy-three million, eight hundred seventy-nine thousand, six hundred forty-nine".