163155563 has 2 divisors, whose sum is σ = 163155564. Its totient is φ = 163155562.

The previous prime is 163155557. The next prime is 163155581. The reversal of 163155563 is 365551361.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 163155563 - 2¹² = 163151467 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (163175563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81577781 + 81577782.

It is an arithmetic number, because the mean of its divisors is an integer number (81577782).

Almost surely, 2^163155563 is an apocalyptic number.

163155563 is a deficient number, since it is larger than the sum of its proper divisors (1).

163155563 is an equidigital number, since it uses as much as digits as its factorization.

163155563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40500, while the sum is 35.

The square root of 163155563 is about 12773.2361991783. The cubic root of 163155563 is about 546.4292792840.

The spelling of 163155563 in words is "one hundred sixty-three million, one hundred fifty-five thousand, five hundred sixty-three".