111668651593 has 2 divisors, whose sum is σ = 111668651594. Its totient is φ = 111668651592.

The previous prime is 111668651581. The next prime is 111668651651. The reversal of 111668651593 is 395156866111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96479814544 + 15188837049 = 310612^2 + 123243^2 .

It is a cyclic number.

It is not a de Polignac number, because 111668651593 - 2⁵ = 111668651561 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111668651593.

It is not a weakly prime, because it can be changed into another prime (111668651533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55834325796 + 55834325797.

It is an arithmetic number, because the mean of its divisors is an integer number (55834325797).

Almost surely, 2^111668651593 is an apocalyptic number.

It is an amenable number.

111668651593 is a deficient number, since it is larger than the sum of its proper divisors (1).

111668651593 is an equidigital number, since it uses as much as digits as its factorization.

111668651593 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1166400, while the sum is 52.

The spelling of 111668651593 in words is "one hundred eleven billion, six hundred sixty-eight million, six hundred fifty-one thousand, five hundred ninety-three".