9888553996620 has 192 divisors, whose sum is σ = 32341826676096. Its totient is φ = 2235046625280.

The previous prime is 9888553996609. The next prime is 9888553996621. The reversal of 9888553996620 is 266993558889.

It is a Harshad number since it is a multiple of its sum of digits (78).

It is not an unprimeable number, because it can be changed into a prime (9888553996621) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8550769 + ... + 9638088.

It is an arithmetic number, because the mean of its divisors is an integer number (168447013938).

Almost surely, 2^{9888553996620} is an apocalyptic number.

It is an amenable number.

9888553996620 is an abundant number, since it is smaller than the sum of its proper divisors (22453272679476).

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

9888553996620 is a wasteful number, since it uses less digits than its factorization.

9888553996620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18188940 (or 18188938 counting only the distinct ones).

The product of its (nonzero) digits is 2015539200, while the sum is 78.

The spelling of 9888553996620 in words is "nine trillion, eight hundred eighty-eight billion, five hundred fifty-three million, nine hundred ninety-six thousand, six hundred twenty".