1818969456 has 40 divisors (see below), whose sum is σ = 4713241984. Its totient is φ = 604486080.

The previous prime is 1818969443. The next prime is 1818969457. The reversal of 1818969456 is 6549698181.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 1818969396 and 1818969405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818969457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41356 + ... + 73131.

Almost surely, 2^1818969456 is an apocalyptic number.

1818969456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1818969456 is an abundant number, since it is smaller than the sum of its proper divisors (2894272528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1818969456 is a wasteful number, since it uses less digits than its factorization.

1818969456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114829 (or 114823 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 57.

The square root of 1818969456 is about 42649.3781431805. The cubic root of 1818969456 is about 1220.6986627932.

The spelling of 1818969456 in words is "one billion, eight hundred eighteen million, nine hundred sixty-nine thousand, four hundred fifty-six".