1818553842 has 40 divisors (see below), whose sum is σ = 4657040256. Its totient is φ = 519586488.

The previous prime is 1818553831. The next prime is 1818553883. The reversal of 1818553842 is 2483558181.

1818553842 is a `hidden beast` number, since 1 + 8 + 18 + 553 + 84 + 2 = 666.

It is a super-3 number, since 3×1818553842³ (a number of 29 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 800698 + ... + 802965.

Almost surely, 2^1818553842 is an apocalyptic number.

1818553842 is an abundant number, since it is smaller than the sum of its proper divisors (2838486414).

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

1818553842 is a wasteful number, since it uses less digits than its factorization.

1818553842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1603684 (or 1603675 counting only the distinct ones).

The product of its digits is 307200, while the sum is 45.

The square root of 1818553842 is about 42644.5054139452. The cubic root of 1818553842 is about 1220.6056837536.

It can be divided in two parts, 18185 and 53842, that added together give a palindrome (72027).

The spelling of 1818553842 in words is "one billion, eight hundred eighteen million, five hundred fifty-three thousand, eight hundred forty-two".