1817216652 has 48 divisors (see below), whose sum is σ = 4391217152. Its totient is φ = 584288640.

The previous prime is 1817216641. The next prime is 1817216669. The reversal of 1817216652 is 2566127181.

It is a self number, because there is not a number n which added to its sum of digits gives 1817216652.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108633 + ... + 124239.

Almost surely, 2^1817216652 is an apocalyptic number.

1817216652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1817216652 is an abundant number, since it is smaller than the sum of its proper divisors (2574000500).

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

1817216652 is a wasteful number, since it uses less digits than its factorization.

1817216652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15958 (or 15956 counting only the distinct ones).

The product of its digits is 40320, while the sum is 39.

The square root of 1817216652 is about 42628.8241920886. The cubic root of 1817216652 is about 1220.3064382964.

The spelling of 1817216652 in words is "one billion, eight hundred seventeen million, two hundred sixteen thousand, six hundred fifty-two".