18146816416 has 12 divisors (see below), whose sum is σ = 35726544882. Its totient is φ = 9073408192.

The previous prime is 18146816383. The next prime is 18146816459. The reversal of 18146816416 is 61461864181.

It can be written as a sum of positive squares in only one way, i.e., 13331011600 + 4815804816 = 115460^2 + 69396^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 283543975 + ... + 283544038.

Almost surely, 2^18146816416 is an apocalyptic number.

18146816416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18146816416 is a deficient number, since it is larger than the sum of its proper divisors (17579728466).

18146816416 is an equidigital number, since it uses as much as digits as its factorization.

18146816416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567088023 (or 567088015 counting only the distinct ones).

The product of its digits is 221184, while the sum is 46.

The spelling of 18146816416 in words is "eighteen billion, one hundred forty-six million, eight hundred sixteen thousand, four hundred sixteen".