163172677427 has 2 divisors, whose sum is σ = 163172677428. Its totient is φ = 163172677426.

The previous prime is 163172677403. The next prime is 163172677433. The reversal of 163172677427 is 724776271361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 163172677427 - 2¹² = 163172673331 is a prime.

It is not a weakly prime, because it can be changed into another prime (163172677457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81586338713 + 81586338714.

It is an arithmetic number, because the mean of its divisors is an integer number (81586338714).

Almost surely, 2^163172677427 is an apocalyptic number.

163172677427 is a deficient number, since it is larger than the sum of its proper divisors (1).

163172677427 is an equidigital number, since it uses as much as digits as its factorization.

163172677427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4148928, while the sum is 53.

The spelling of 163172677427 in words is "one hundred sixty-three billion, one hundred seventy-two million, six hundred seventy-seven thousand, four hundred twenty-seven".