161028553 has 16 divisors (see below), whose sum is σ = 197680000. Its totient is φ = 130754736.

The previous prime is 161028547. The next prime is 161028559. The reversal of 161028553 is 355820161.

It is an interprime number because it is at equal distance from previous prime (161028547) and next prime (161028559).

It is not a de Polignac number, because 161028553 - 2⁹ = 161028041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161028559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5838 + ... + 18871.

It is an arithmetic number, because the mean of its divisors is an integer number (12355000).

Almost surely, 2^161028553 is an apocalyptic number.

It is an amenable number.

161028553 is a deficient number, since it is larger than the sum of its proper divisors (36651447).

161028553 is an equidigital number, since it uses as much as digits as its factorization.

161028553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24749 (or 24735 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 161028553 is about 12689.7026363899. The cubic root of 161028553 is about 544.0443404332.

The spelling of 161028553 in words is "one hundred sixty-one million, twenty-eight thousand, five hundred fifty-three".