188188751661073 has 2 divisors, whose sum is σ = 188188751661074. Its totient is φ = 188188751661072.

The previous prime is 188188751660983. The next prime is 188188751661133. The reversal of 188188751661073 is 370166157881881.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115221825944449 + 72966925716624 = 10734143^2 + 8542068^2 .

It is a cyclic number.

It is not a de Polignac number, because 188188751661073 - 2⁹ = 188188751660561 is a prime.

It is a super-2 number, since 2×188188751661073² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 188188751660993 and 188188751661011.

It is not a weakly prime, because it can be changed into another prime (188188751664073) 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, 94094375830536 + 94094375830537.

It is an arithmetic number, because the mean of its divisors is an integer number (94094375830537).

Almost surely, 2^{188188751661073} is an apocalyptic number.

It is an amenable number.

188188751661073 is a deficient number, since it is larger than the sum of its proper divisors (1).

188188751661073 is an equidigital number, since it uses as much as digits as its factorization.

188188751661073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108380160, while the sum is 70.

The spelling of 188188751661073 in words is "one hundred eighty-eight trillion, one hundred eighty-eight billion, seven hundred fifty-one million, six hundred sixty-one thousand, seventy-three".