161888145 has 16 divisors (see below), whose sum is σ = 270283392. Its totient is φ = 82586240.

The previous prime is 161888141. The next prime is 161888149. The reversal of 161888145 is 541888161.

161888145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (161888141) and next prime (161888149).

It is not a de Polignac number, because 161888145 - 2² = 161888141 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 161888097 and 161888106.

It is not an unprimeable number, because it can be changed into a prime (161888141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 234276 + ... + 234965.

It is an arithmetic number, because the mean of its divisors is an integer number (16892712).

Almost surely, 2^161888145 is an apocalyptic number.

161888145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161888145 is a deficient number, since it is larger than the sum of its proper divisors (108395247).

161888145 is a wasteful number, since it uses less digits than its factorization.

161888145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469272.

The product of its digits is 61440, while the sum is 42.

The square root of 161888145 is about 12723.5272232192. The cubic root of 161888145 is about 545.0106835153.

The spelling of 161888145 in words is "one hundred sixty-one million, eight hundred eighty-eight thousand, one hundred forty-five".