161288017427 has 2 divisors, whose sum is σ = 161288017428. Its totient is φ = 161288017426.

The previous prime is 161288017393. The next prime is 161288017453. The reversal of 161288017427 is 724710882161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161288017427 - 2¹⁰ = 161288016403 is a prime.

It is not a weakly prime, because it can be changed into another prime (161288017487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80644008713 + 80644008714.

It is an arithmetic number, because the mean of its divisors is an integer number (80644008714).

Almost surely, 2^161288017427 is an apocalyptic number.

161288017427 is a deficient number, since it is larger than the sum of its proper divisors (1).

161288017427 is an equidigital number, since it uses as much as digits as its factorization.

161288017427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 301056, while the sum is 47.

Adding to 161288017427 its reverse (724710882161), we get a palindrome (885998899588).

The spelling of 161288017427 in words is "one hundred sixty-one billion, two hundred eighty-eight million, seventeen thousand, four hundred twenty-seven".