163456553 has 8 divisors (see below), whose sum is σ = 179776128. Its totient is φ = 147672144.

The previous prime is 163456549. The next prime is 163456567. The reversal of 163456553 is 355654361.

163456553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163456553 - 2² = 163456549 is a prime.

It is not an unprimeable number, because it can be changed into a prime (163456523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133151 + ... + 134372.

It is an arithmetic number, because the mean of its divisors is an integer number (22472016).

Almost surely, 2^163456553 is an apocalyptic number.

163456553 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

163456553 is a deficient number, since it is larger than the sum of its proper divisors (16319575).

163456553 is a wasteful number, since it uses less digits than its factorization.

163456553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267583.

The product of its digits is 162000, while the sum is 38.

The square root of 163456553 is about 12785.0128275258. The cubic root of 163456553 is about 546.7650911336.

The spelling of 163456553 in words is "one hundred sixty-three million, four hundred fifty-six thousand, five hundred fifty-three".