9561949800 has 96 divisors (see below), whose sum is σ = 31922227680. Its totient is φ = 2353708800.

The previous prime is 9561949799. The next prime is 9561949807. The reversal of 9561949800 is 89491659.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (9561949807) 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, 605146 + ... + 620745.

It is an arithmetic number, because the mean of its divisors is an integer number (332523205).

Almost surely, 2^9561949800 is an apocalyptic number.

It is an amenable number.

9561949800 is an abundant number, since it is smaller than the sum of its proper divisors (22360277880).

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

9561949800 is a wasteful number, since it uses less digits than its factorization.

9561949800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225923 (or 1225914 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 51.

The square root of 9561949800 is about 97785.2228099931. Note that the first 3 decimals coincide. The cubic root of 9561949800 is about 2122.5054779194.

The spelling of 9561949800 in words is "nine billion, five hundred sixty-one million, nine hundred forty-nine thousand, eight hundred".