161814458 has 12 divisors (see below), whose sum is σ = 262829358. Its totient is φ = 74683440.

The previous prime is 161814439. The next prime is 161814463. The reversal of 161814458 is 854418161.

It can be written as a sum of positive squares in 3 ways, for example, as 39778249 + 122036209 = 6307^2 + 11047^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 239033 + ... + 239708.

Almost surely, 2^161814458 is an apocalyptic number.

161814458 is a deficient number, since it is larger than the sum of its proper divisors (101014900).

161814458 is a wasteful number, since it uses less digits than its factorization.

161814458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478769 (or 478756 counting only the distinct ones).

The product of its digits is 30720, while the sum is 38.

The square root of 161814458 is about 12720.6311950312. The cubic root of 161814458 is about 544.9279797096.

The spelling of 161814458 in words is "one hundred sixty-one million, eight hundred fourteen thousand, four hundred fifty-eight".