1818349956 has 36 divisors (see below), whose sum is σ = 4600936704. Its totient is φ = 605516400.

The previous prime is 1818349943. The next prime is 1818349957. The reversal of 1818349956 is 6599438181.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (1818349957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12621 + ... + 61611.

Almost surely, 2^1818349956 is an apocalyptic number.

It is an amenable number.

1818349956 is an abundant number, since it is smaller than the sum of its proper divisors (2782586748).

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

1818349956 is a wasteful number, since it uses less digits than its factorization.

1818349956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50032 (or 50027 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The square root of 1818349956 is about 42642.1148162236. The cubic root of 1818349956 is about 1220.5600662404.

The spelling of 1818349956 in words is "one billion, eight hundred eighteen million, three hundred forty-nine thousand, nine hundred fifty-six".