16181310458 has 4 divisors (see below), whose sum is σ = 24271965690. Its totient is φ = 8090655228.

The previous prime is 16181310449. The next prime is 16181310503. The reversal of 16181310458 is 85401318161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15513449809 + 667860649 = 124553^2 + 25843^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4045327613 + ... + 4045327616.

Almost surely, 2^16181310458 is an apocalyptic number.

16181310458 is a deficient number, since it is larger than the sum of its proper divisors (8090655232).

16181310458 is an equidigital number, since it uses as much as digits as its factorization.

16181310458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8090655231.

The product of its (nonzero) digits is 23040, while the sum is 38.

It can be divided in two parts, 161813 and 10458, that added together give a palindrome (172271).

The spelling of 16181310458 in words is "sixteen billion, one hundred eighty-one million, three hundred ten thousand, four hundred fifty-eight".