1816453378 has 8 divisors (see below), whose sum is σ = 2725399872. Its totient is φ = 907986756.

The previous prime is 1816453369. The next prime is 1816453393. The reversal of 1816453378 is 8733546181.

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

It is a super-2 number, since 2×1816453378² = 6599005748895221768, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110350 + ... + 125737.

It is an arithmetic number, because the mean of its divisors is an integer number (340674984).

Almost surely, 2^1816453378 is an apocalyptic number.

1816453378 is a deficient number, since it is larger than the sum of its proper divisors (908946494).

1816453378 is a wasteful number, since it uses less digits than its factorization.

1816453378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239936.

The product of its digits is 483840, while the sum is 46.

The square root of 1816453378 is about 42619.8706943135. The cubic root of 1816453378 is about 1220.1355618422.

The spelling of 1816453378 in words is "one billion, eight hundred sixteen million, four hundred fifty-three thousand, three hundred seventy-eight".