9991202420160 has 224 divisors, whose sum is σ = 37958030134080. Its totient is φ = 2459372875776.

The previous prime is 9991202420141. The next prime is 9991202420257. The reversal of 9991202420160 is 610242021999.

9991202420160 is a `hidden beast` number, since 9 + 9 + 9 + 1 + 202 + 420 + 16 + 0 = 666.

It is a super-2 number, since 2×9991202420160² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44364187 + ... + 44588826.

It is an arithmetic number, because the mean of its divisors is an integer number (169455491670).

Almost surely, 2^{9991202420160} is an apocalyptic number.

9991202420160 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

9991202420160 is an abundant number, since it is smaller than the sum of its proper divisors (27966827713920).

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

9991202420160 is a wasteful number, since it uses less digits than its factorization.

9991202420160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88953052 (or 88953036 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The spelling of 9991202420160 in words is "nine trillion, nine hundred ninety-one billion, two hundred two million, four hundred twenty thousand, one hundred sixty".