1618226816 has 16 divisors (see below), whose sum is σ = 3223811490. Its totient is φ = 809113344.

The previous prime is 1618226809. The next prime is 1618226837. The reversal of 1618226816 is 6186228161.

It can be written as a sum of positive squares in only one way, i.e., 1376113216 + 242113600 = 37096^2 + 15560^2 .

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 (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6321071 + ... + 6321326.

Almost surely, 2^1618226816 is an apocalyptic number.

1618226816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1618226816 is a deficient number, since it is larger than the sum of its proper divisors (1605584674).

1618226816 is an equidigital number, since it uses as much as digits as its factorization.

1618226816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12642411 (or 12642399 counting only the distinct ones).

The product of its digits is 55296, while the sum is 41.

The square root of 1618226816 is about 40227.1900087491. The cubic root of 1618226816 is about 1174.0316309351.

The spelling of 1618226816 in words is "one billion, six hundred eighteen million, two hundred twenty-six thousand, eight hundred sixteen".