1618843672 has 16 divisors (see below), whose sum is σ = 3109365000. Its totient is φ = 789679680.

The previous prime is 1618843651. The next prime is 1618843673. The reversal of 1618843672 is 2763488161.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1618843673) 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 3 ways as a sum of consecutive naturals, for example, 2467422 + ... + 2468077.

Almost surely, 2^1618843672 is an apocalyptic number.

It is an amenable number.

1618843672 is a deficient number, since it is larger than the sum of its proper divisors (1490521328).

1618843672 is a wasteful number, since it uses less digits than its factorization.

1618843672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4935546 (or 4935542 counting only the distinct ones).

The product of its digits is 387072, while the sum is 46.

The square root of 1618843672 is about 40234.8564307119. The cubic root of 1618843672 is about 1174.1807893528.

The spelling of 1618843672 in words is "one billion, six hundred eighteen million, eight hundred forty-three thousand, six hundred seventy-two".