161406458 has 8 divisors (see below), whose sum is σ = 242264628. Its totient is φ = 80651584.

The previous prime is 161406457. The next prime is 161406473. The reversal of 161406458 is 854604161.

It can be written as a sum of positive squares in 2 ways, for example, as 152448409 + 8958049 = 12347^2 + 2993^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (161406451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21791 + ... + 28242.

Almost surely, 2^161406458 is an apocalyptic number.

161406458 is a deficient number, since it is larger than the sum of its proper divisors (80858170).

161406458 is a wasteful number, since it uses less digits than its factorization.

161406458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51648.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 161406458 is about 12704.5841332961. The cubic root of 161406458 is about 544.4695992851.

The spelling of 161406458 in words is "one hundred sixty-one million, four hundred six thousand, four hundred fifty-eight".