9961136899 has 8 divisors (see below), whose sum is σ = 11394302720. Its totient is φ = 8530507656.

The previous prime is 9961136879. The next prime is 9961136917. The reversal of 9961136899 is 9986311699.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9961136899 - 2¹¹ = 9961134851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9961136849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 625719 + ... + 641440.

It is an arithmetic number, because the mean of its divisors is an integer number (1424287840).

Almost surely, 2^9961136899 is an apocalyptic number.

9961136899 is a deficient number, since it is larger than the sum of its proper divisors (1433165821).

9961136899 is a wasteful number, since it uses less digits than its factorization.

9961136899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1268289.

The product of its digits is 5668704, while the sum is 61.

The square root of 9961136899 is about 99805.4953346758. The cubic root of 9961136899 is about 2151.6401329623.

The spelling of 9961136899 in words is "nine billion, nine hundred sixty-one million, one hundred thirty-six thousand, eight hundred ninety-nine".