161489151 has 24 divisors (see below), whose sum is σ = 246246000. Its totient is φ = 101699712.

The previous prime is 161489149. The next prime is 161489173. The reversal of 161489151 is 151984161.

It is a happy number.

161489151 is a `hidden beast` number, since 161 + 489 + 15 + 1 = 666.

It is not a de Polignac number, because 161489151 - 2¹ = 161489149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161489131) 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 23 ways as a sum of consecutive naturals, for example, 68785 + ... + 71093.

It is an arithmetic number, because the mean of its divisors is an integer number (10260250).

Almost surely, 2^161489151 is an apocalyptic number.

161489151 is a deficient number, since it is larger than the sum of its proper divisors (84756849).

161489151 is a wasteful number, since it uses less digits than its factorization.

161489151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2743 (or 2740 counting only the distinct ones).

The product of its digits is 8640, while the sum is 36.

The square root of 161489151 is about 12707.8381717741. The cubic root of 161489151 is about 544.5625656970.

The spelling of 161489151 in words is "one hundred sixty-one million, four hundred eighty-nine thousand, one hundred fifty-one".