1636946444 has 48 divisors (see below), whose sum is σ = 3557406720. Its totient is φ = 643178880.

The previous prime is 1636946431. The next prime is 1636946471. The reversal of 1636946444 is 4446496361.

It is a happy number.

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, 33137 + ... + 66120.

It is an arithmetic number, because the mean of its divisors is an integer number (74112640).

Almost surely, 2^1636946444 is an apocalyptic number.

1636946444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1636946444 is an abundant number, since it is smaller than the sum of its proper divisors (1920460276).

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

1636946444 is a wasteful number, since it uses less digits than its factorization.

1636946444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99318 (or 99316 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 47.

The square root of 1636946444 is about 40459.1948016764. The cubic root of 1636946444 is about 1178.5413471124.

The spelling of 1636946444 in words is "one billion, six hundred thirty-six million, nine hundred forty-six thousand, four hundred forty-four".