1816445964416 has 16 divisors (see below), whose sum is σ = 3618700944990. Its totient is φ = 908222982144.

The previous prime is 1816445964343. The next prime is 1816445964449. The reversal of 1816445964416 is 6144695446181.

It can be written as a sum of positive squares in only one way, i.e., 1004212426816 + 812233537600 = 1002104^2 + 901240^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 7095491921 + ... + 7095492176.

Almost surely, 2^{1816445964416} is an apocalyptic number.

1816445964416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1816445964416 is a deficient number, since it is larger than the sum of its proper divisors (1802254980574).

1816445964416 is an equidigital number, since it uses as much as digits as its factorization.

1816445964416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14190984111 (or 14190984099 counting only the distinct ones).

The product of its digits is 19906560, while the sum is 59.

The spelling of 1816445964416 in words is "one trillion, eight hundred sixteen billion, four hundred forty-five million, nine hundred sixty-four thousand, four hundred sixteen".