113445571661 has 2 divisors, whose sum is σ = 113445571662. Its totient is φ = 113445571660.

The previous prime is 113445571643. The next prime is 113445571667. The reversal of 113445571661 is 166175544311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89442266761 + 24003304900 = 299069^2 + 154930^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113445571661 is a prime.

It is a super-3 number, since 3×113445571661³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113445571667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56722785830 + 56722785831.

It is an arithmetic number, because the mean of its divisors is an integer number (56722785831).

Almost surely, 2^113445571661 is an apocalyptic number.

It is an amenable number.

113445571661 is a deficient number, since it is larger than the sum of its proper divisors (1).

113445571661 is an equidigital number, since it uses as much as digits as its factorization.

113445571661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 302400, while the sum is 44.

The spelling of 113445571661 in words is "one hundred thirteen billion, four hundred forty-five million, five hundred seventy-one thousand, six hundred sixty-one".