1636118652 has 48 divisors (see below), whose sum is σ = 4592618240. Its totient is φ = 442858752.

The previous prime is 1636118623. The next prime is 1636118683. The reversal of 1636118652 is 2568116361.

It is a self number, because there is not a number n which added to its sum of digits gives 1636118652.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 510973 + ... + 514164.

Almost surely, 2^1636118652 is an apocalyptic number.

1636118652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1636118652 is an abundant number, since it is smaller than the sum of its proper divisors (2956499588).

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

1636118652 is a wasteful number, since it uses less digits than its factorization.

1636118652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025170 (or 1025168 counting only the distinct ones).

The product of its digits is 51840, while the sum is 39.

The square root of 1636118652 is about 40448.9635466720. The cubic root of 1636118652 is about 1178.3426536655.

The spelling of 1636118652 in words is "one billion, six hundred thirty-six million, one hundred eighteen thousand, six hundred fifty-two".