157909866157 has 2 divisors, whose sum is σ = 157909866158. Its totient is φ = 157909866156.

The previous prime is 157909866041. The next prime is 157909866209. The reversal of 157909866157 is 751668909751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95823678916 + 62086187241 = 309554^2 + 249171^2 .

It is a cyclic number.

It is not a de Polignac number, because 157909866157 - 2²³ = 157901477549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157909861157) 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, 78954933078 + 78954933079.

It is an arithmetic number, because the mean of its divisors is an integer number (78954933079).

Almost surely, 2^157909866157 is an apocalyptic number.

It is an amenable number.

157909866157 is a deficient number, since it is larger than the sum of its proper divisors (1).

157909866157 is an equidigital number, since it uses as much as digits as its factorization.

157909866157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28576800, while the sum is 64.

The spelling of 157909866157 in words is "one hundred fifty-seven billion, nine hundred nine million, eight hundred sixty-six thousand, one hundred fifty-seven".