161025055 has 24 divisors (see below), whose sum is σ = 201504960. Its totient is φ = 123493440.

The previous prime is 161025043. The next prime is 161025061. The reversal of 161025055 is 550520161.

It is not a de Polignac number, because 161025055 - 2⁹ = 161024543 is a prime.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 673626 + ... + 673864.

It is an arithmetic number, because the mean of its divisors is an integer number (8396040).

Almost surely, 2^161025055 is an apocalyptic number.

161025055 is a deficient number, since it is larger than the sum of its proper divisors (40479905).

161025055 is an equidigital number, since it uses as much as digits as its factorization.

161025055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399 (or 352 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 161025055 is about 12689.5648073525. The cubic root of 161025055 is about 544.0404010058.

The spelling of 161025055 in words is "one hundred sixty-one million, twenty-five thousand, fifty-five".