163554553 has 2 divisors, whose sum is σ = 163554554. Its totient is φ = 163554552.

The previous prime is 163554551. The next prime is 163554581. The reversal of 163554553 is 355455361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163532944 + 21609 = 12788^2 + 147^2 .

It is an emirp because it is prime and its reverse (355455361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163554553 - 2¹ = 163554551 is a prime.

Together with 163554551, it forms a pair of twin primes.

It is equal to p_9162559 and since 163554553 and 9162559 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (163554551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81777276 + 81777277.

It is an arithmetic number, because the mean of its divisors is an integer number (81777277).

Almost surely, 2^163554553 is an apocalyptic number.

It is an amenable number.

163554553 is a deficient number, since it is larger than the sum of its proper divisors (1).

163554553 is an equidigital number, since it uses as much as digits as its factorization.

163554553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 135000, while the sum is 37.

The square root of 163554553 is about 12788.8448657414. The cubic root of 163554553 is about 546.8743398871.

The spelling of 163554553 in words is "one hundred sixty-three million, five hundred fifty-four thousand, five hundred fifty-three".