17772364889 has 2 divisors, whose sum is σ = 17772364890. Its totient is φ = 17772364888.

The previous prime is 17772364879. The next prime is 17772364969. The reversal of 17772364889 is 98846327771.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15608254489 + 2164110400 = 124933^2 + 46520^2 .

It is a cyclic number.

It is not a de Polignac number, because 17772364889 - 2¹⁶ = 17772299353 is a prime.

It is not a weakly prime, because it can be changed into another prime (17772364879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8886182444 + 8886182445.

It is an arithmetic number, because the mean of its divisors is an integer number (8886182445).

Almost surely, 2^17772364889 is an apocalyptic number.

It is an amenable number.

17772364889 is a deficient number, since it is larger than the sum of its proper divisors (1).

17772364889 is an equidigital number, since it uses as much as digits as its factorization.

17772364889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28449792, while the sum is 62.

The spelling of 17772364889 in words is "seventeen billion, seven hundred seventy-two million, three hundred sixty-four thousand, eight hundred eighty-nine".