9661904893800 has 192 divisors, whose sum is σ = 35031468408000. Its totient is φ = 2440902263040.

The previous prime is 9661904893777. The next prime is 9661904893829. The reversal of 9661904893800 is 83984091669.

It is a happy number.

9661904893800 is a `hidden beast` number, since 9 + 6 + 61 + 90 + 489 + 3 + 8 + 0 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 46982707 + ... + 47187906.

It is an arithmetic number, because the mean of its divisors is an integer number (182455564625).

Almost surely, 2^{9661904893800} is an apocalyptic number.

9661904893800 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

9661904893800 is an abundant number, since it is smaller than the sum of its proper divisors (25369563514200).

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

9661904893800 is a wasteful number, since it uses less digits than its factorization.

9661904893800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94170657 (or 94170642 counting only the distinct ones).

The product of its (nonzero) digits is 20155392, while the sum is 63.

The spelling of 9661904893800 in words is "nine trillion, six hundred sixty-one billion, nine hundred four million, eight hundred ninety-three thousand, eight hundred".