189381951911 has 2 divisors, whose sum is σ = 189381951912. Its totient is φ = 189381951910.

The previous prime is 189381951853. The next prime is 189381951917. The reversal of 189381951911 is 119159183981.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189381951911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189381951917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94690975955 + 94690975956.

It is an arithmetic number, because the mean of its divisors is an integer number (94690975956).

Almost surely, 2^189381951911 is an apocalyptic number.

189381951911 is a deficient number, since it is larger than the sum of its proper divisors (1).

189381951911 is an equidigital number, since it uses as much as digits as its factorization.

189381951911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 699840, while the sum is 56.

The spelling of 189381951911 in words is "one hundred eighty-nine billion, three hundred eighty-one million, nine hundred fifty-one thousand, nine hundred eleven".