22171733977 has 2 divisors, whose sum is σ = 22171733978. Its totient is φ = 22171733976.

The previous prime is 22171733957. The next prime is 22171733993. The reversal of 22171733977 is 77933717122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16502999296 + 5668734681 = 128464^2 + 75291^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22171733977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22171733977.

It is not a weakly prime, because it can be changed into another prime (22171733957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11085866988 + 11085866989.

It is an arithmetic number, because the mean of its divisors is an integer number (11085866989).

Almost surely, 2^22171733977 is an apocalyptic number.

It is an amenable number.

22171733977 is a deficient number, since it is larger than the sum of its proper divisors (1).

22171733977 is an equidigital number, since it uses as much as digits as its factorization.

22171733977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 777924, while the sum is 49.

The spelling of 22171733977 in words is "twenty-two billion, one hundred seventy-one million, seven hundred thirty-three thousand, nine hundred seventy-seven".