189361308761 has 2 divisors, whose sum is σ = 189361308762. Its totient is φ = 189361308760.

The previous prime is 189361308739. The next prime is 189361308769. The reversal of 189361308761 is 167803163981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188133857536 + 1227451225 = 433744^2 + 35035^2 .

It is a cyclic number.

It is not a de Polignac number, because 189361308761 - 2¹⁴ = 189361292377 is a prime.

It is not a weakly prime, because it can be changed into another prime (189361308769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94680654380 + 94680654381.

It is an arithmetic number, because the mean of its divisors is an integer number (94680654381).

Almost surely, 2^189361308761 is an apocalyptic number.

It is an amenable number.

189361308761 is a deficient number, since it is larger than the sum of its proper divisors (1).

189361308761 is an equidigital number, since it uses as much as digits as its factorization.

189361308761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The spelling of 189361308761 in words is "one hundred eighty-nine billion, three hundred sixty-one million, three hundred eight thousand, seven hundred sixty-one".