9634865891672 has 32 divisors (see below), whose sum is σ = 21204145017120. Its totient is φ = 4017627475200.

The previous prime is 9634865891641. The next prime is 9634865891681. The reversal of 9634865891672 is 2761985684369.

It is a Harshad number since it is a multiple of its sum of digits (74).

It is a self number, because there is not a number n which added to its sum of digits gives 9634865891672.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2325013829 + ... + 2325017972.

It is an arithmetic number, because the mean of its divisors is an integer number (662629531785).

Almost surely, 2^{9634865891672} is an apocalyptic number.

It is an amenable number.

9634865891672 is an abundant number, since it is smaller than the sum of its proper divisors (11569279125448).

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

9634865891672 is a wasteful number, since it uses less digits than its factorization.

9634865891672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4650031851 (or 4650031847 counting only the distinct ones).

The product of its digits is 940584960, while the sum is 74.

The spelling of 9634865891672 in words is "nine trillion, six hundred thirty-four billion, eight hundred sixty-five million, eight hundred ninety-one thousand, six hundred seventy-two".