157194185189 has 2 divisors, whose sum is σ = 157194185190. Its totient is φ = 157194185188.

The previous prime is 157194185143. The next prime is 157194185191. The reversal of 157194185189 is 981581491751.

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., 138689208100 + 18504977089 = 372410^2 + 136033^2 .

It is a cyclic number.

It is not a de Polignac number, because 157194185189 - 2¹² = 157194181093 is a prime.

Together with 157194185191, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157194185129) 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, 78597092594 + 78597092595.

It is an arithmetic number, because the mean of its divisors is an integer number (78597092595).

Almost surely, 2^157194185189 is an apocalyptic number.

It is an amenable number.

157194185189 is a deficient number, since it is larger than the sum of its proper divisors (1).

157194185189 is an equidigital number, since it uses as much as digits as its factorization.

157194185189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3628800, while the sum is 59.

The spelling of 157194185189 in words is "one hundred fifty-seven billion, one hundred ninety-four million, one hundred eighty-five thousand, one hundred eighty-nine".