1816275120 has 160 divisors (see below), whose sum is σ = 6340737024. Its totient is φ = 426086400.

The previous prime is 1816275091. The next prime is 1816275127. The reversal of 1816275120 is 215726181.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (1816275127) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 70744 + ... + 92936.

Almost surely, 2^1816275120 is an apocalyptic number.

1816275120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1816275120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3170368512).

1816275120 is an abundant number, since it is smaller than the sum of its proper divisors (4524461904).

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

1816275120 is a wasteful number, since it uses less digits than its factorization.

1816275120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22251 (or 22245 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 33.

The square root of 1816275120 is about 42617.7793884196. The cubic root of 1816275120 is about 1220.0956477908.

The spelling of 1816275120 in words is "one billion, eight hundred sixteen million, two hundred seventy-five thousand, one hundred twenty".