188461147891 has 2 divisors, whose sum is σ = 188461147892. Its totient is φ = 188461147890.

The previous prime is 188461147817. The next prime is 188461147961. The reversal of 188461147891 is 198741164881.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-188461147891 is a prime.

It is not a weakly prime, because it can be changed into another prime (188461147811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94230573945 + 94230573946.

It is an arithmetic number, because the mean of its divisors is an integer number (94230573946).

Almost surely, 2^188461147891 is an apocalyptic number.

188461147891 is a deficient number, since it is larger than the sum of its proper divisors (1).

188461147891 is an equidigital number, since it uses as much as digits as its factorization.

188461147891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3096576, while the sum is 58.

The spelling of 188461147891 in words is "one hundred eighty-eight billion, four hundred sixty-one million, one hundred forty-seven thousand, eight hundred ninety-one".