161426563 has 2 divisors, whose sum is σ = 161426564. Its totient is φ = 161426562.

The previous prime is 161426549. The next prime is 161426569. The reversal of 161426563 is 365624161.

161426563 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 a cyclic number.

It is not a de Polignac number, because 161426563 - 2¹³ = 161418371 is a prime.

It is not a weakly prime, because it can be changed into another prime (161426569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80713281 + 80713282.

It is an arithmetic number, because the mean of its divisors is an integer number (80713282).

Almost surely, 2^161426563 is an apocalyptic number.

161426563 is a deficient number, since it is larger than the sum of its proper divisors (1).

161426563 is an equidigital number, since it uses as much as digits as its factorization.

161426563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 34.

The square root of 161426563 is about 12705.3753584851. The cubic root of 161426563 is about 544.4922049622.

The spelling of 161426563 in words is "one hundred sixty-one million, four hundred twenty-six thousand, five hundred sixty-three".