1636323044 has 12 divisors (see below), whose sum is σ = 2906305584. Its totient is φ = 805950024.

The previous prime is 1636323043. The next prime is 1636323061. The reversal of 1636323044 is 4403236361.

It is a self number, because there is not a number n which added to its sum of digits gives 1636323044.

It is not an unprimeable number, because it can be changed into a prime (1636323043) 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, 3052574 + ... + 3053109.

It is an arithmetic number, because the mean of its divisors is an integer number (242192132).

Almost surely, 2^1636323044 is an apocalyptic number.

It is an amenable number.

1636323044 is a deficient number, since it is larger than the sum of its proper divisors (1269982540).

1636323044 is a wasteful number, since it uses less digits than its factorization.

1636323044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6105754 (or 6105752 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 32.

The square root of 1636323044 is about 40451.4900096399. The cubic root of 1636323044 is about 1178.3917197449.

The spelling of 1636323044 in words is "one billion, six hundred thirty-six million, three hundred twenty-three thousand, forty-four".