1636318968 has 32 divisors (see below), whose sum is σ = 4231861200. Its totient is φ = 526631168.

The previous prime is 1636318963. The next prime is 1636318993. The reversal of 1636318968 is 8698136361.

It is a self number, because there is not a number n which added to its sum of digits gives 1636318968.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1636318963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1174821 + ... + 1176212.

Almost surely, 2^1636318968 is an apocalyptic number.

It is an amenable number.

1636318968 is an abundant number, since it is smaller than the sum of its proper divisors (2595542232).

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

1636318968 is a wasteful number, since it uses less digits than its factorization.

1636318968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2351071 (or 2351067 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 51.

The square root of 1636318968 is about 40451.4396282753. The cubic root of 1636318968 is about 1178.3907413056.

The spelling of 1636318968 in words is "one billion, six hundred thirty-six million, three hundred eighteen thousand, nine hundred sixty-eight".