161029458 has 30 divisors (see below), whose sum is σ = 361187541. Its totient is φ = 53622648.

The previous prime is 161029441. The next prime is 161029471. The reversal of 161029458 is 854920161.

It can be written as a sum of positive squares in 2 ways, for example, as 136258929 + 24770529 = 11673^2 + 4977^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=8973.

It is a Curzon 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 14 ways as a sum of consecutive naturals, for example, 161016 + ... + 162012.

Almost surely, 2^161029458 is an apocalyptic number.

161029458 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

161029458 is an abundant number, since it is smaller than the sum of its proper divisors (200158083).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161029458 is an frugal number, since it uses more digits than its factorization.

161029458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2008 (or 1002 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 161029458 is about 12689.7382951738. The cubic root of 161029458 is about 544.0453596296.

The spelling of 161029458 in words is "one hundred sixty-one million, twenty-nine thousand, four hundred fifty-eight".