9561999600 has 360 divisors, whose sum is σ = 35001188352. Its totient is φ = 2413785600.

The previous prime is 9561999583. The next prime is 9561999677. The reversal of 9561999600 is 69991659.

It is a tau number, because it is divible by the number of its divisors (360).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5244289 + ... + 5246111.

Almost surely, 2^9561999600 is an apocalyptic number.

9561999600 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9561999600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17500594176).

9561999600 is an abundant number, since it is smaller than the sum of its proper divisors (25439188752).

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

9561999600 is a wasteful number, since it uses less digits than its factorization.

9561999600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1925 (or 1911 counting only the distinct ones).

The product of its (nonzero) digits is 1180980, while the sum is 54.

The square root of 9561999600 is about 97785.4774493636. The cubic root of 9561999600 is about 2122.5091626836.

The spelling of 9561999600 in words is "nine billion, five hundred sixty-one million, nine hundred ninety-nine thousand, six hundred".