1811618472 has 32 divisors (see below), whose sum is σ = 4532616000. Its totient is φ = 603396864.

The previous prime is 1811618453. The next prime is 1811618533. The reversal of 1811618472 is 2748161181.

It is a super-2 number, since 2×1811618472² = 6563922976183229568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1811618472.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2029 + ... + 60227.

It is an arithmetic number, because the mean of its divisors is an integer number (141644250).

Almost surely, 2^1811618472 is an apocalyptic number.

1811618472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1811618472 is an abundant number, since it is smaller than the sum of its proper divisors (2720997528).

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

1811618472 is a wasteful number, since it uses less digits than its factorization.

1811618472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59505 (or 59501 counting only the distinct ones).

The product of its digits is 21504, while the sum is 39.

The square root of 1811618472 is about 42563.1116343718. Note that the first 3 decimals coincide. The cubic root of 1811618472 is about 1219.0520433342.

The spelling of 1811618472 in words is "one billion, eight hundred eleven million, six hundred eighteen thousand, four hundred seventy-two".