9621869526388 has 72 divisors (see below), whose sum is σ = 20220393145344. Its totient is φ = 3990407198400.

The previous prime is 9621869526361. The next prime is 9621869526389. The reversal of 9621869526388 is 8836259681269.

It is a self number, because there is not a number n which added to its sum of digits gives 9621869526388.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9621869526389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 141603670 + ... + 141671602.

Almost surely, 2^{9621869526388} is an apocalyptic number.

9621869526388 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

It is an amenable number.

9621869526388 is an abundant number, since it is smaller than the sum of its proper divisors (10598523618956).

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

9621869526388 is a wasteful number, since it uses less digits than its factorization.

9621869526388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91293 (or 91284 counting only the distinct ones).

The product of its digits is 537477120, while the sum is 73.

The spelling of 9621869526388 in words is "nine trillion, six hundred twenty-one billion, eight hundred sixty-nine million, five hundred twenty-six thousand, three hundred eighty-eight".