22791715649 has 2 divisors, whose sum is σ = 22791715650. Its totient is φ = 22791715648.

The previous prime is 22791715643. The next prime is 22791715673. The reversal of 22791715649 is 94651719722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18767082049 + 4024633600 = 136993^2 + 63440^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22791715649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22791715649.

It is not a weakly prime, because it can be changed into another prime (22791715643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11395857824 + 11395857825.

It is an arithmetic number, because the mean of its divisors is an integer number (11395857825).

Almost surely, 2^22791715649 is an apocalyptic number.

It is an amenable number.

22791715649 is a deficient number, since it is larger than the sum of its proper divisors (1).

22791715649 is an equidigital number, since it uses as much as digits as its factorization.

22791715649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1905120, while the sum is 53.

The spelling of 22791715649 in words is "twenty-two billion, seven hundred ninety-one million, seven hundred fifteen thousand, six hundred forty-nine".