157828220171 has 2 divisors, whose sum is σ = 157828220172. Its totient is φ = 157828220170.

The previous prime is 157828220111. The next prime is 157828220183. The reversal of 157828220171 is 171022828751.

157828220171 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (171022828751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 157828220171 - 2¹⁴ = 157828203787 is a prime.

It is not a weakly prime, because it can be changed into another prime (157828220101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78914110085 + 78914110086.

It is an arithmetic number, because the mean of its divisors is an integer number (78914110086).

Almost surely, 2^157828220171 is an apocalyptic number.

157828220171 is a deficient number, since it is larger than the sum of its proper divisors (1).

157828220171 is an equidigital number, since it uses as much as digits as its factorization.

157828220171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 125440, while the sum is 44.

The spelling of 157828220171 in words is "one hundred fifty-seven billion, eight hundred twenty-eight million, two hundred twenty thousand, one hundred seventy-one".