9961359894 has 12 divisors (see below), whose sum is σ = 21582946476. Its totient is φ = 3320453292.

The previous prime is 9961359887. The next prime is 9961359913. The reversal of 9961359894 is 4989531699.

9961359894 is a `hidden beast` number, since 9 + 9 + 613 + 5 + 9 + 8 + 9 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 276704424 + ... + 276704459.

It is an arithmetic number, because the mean of its divisors is an integer number (1798578873).

Almost surely, 2^9961359894 is an apocalyptic number.

9961359894 is an abundant number, since it is smaller than the sum of its proper divisors (11621586582).

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

9961359894 is a wasteful number, since it uses less digits than its factorization.

9961359894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553408891 (or 553408888 counting only the distinct ones).

The product of its digits is 18895680, while the sum is 63.

The square root of 9961359894 is about 99806.6124763284. The cubic root of 9961359894 is about 2151.6561887404.

The spelling of 9961359894 in words is "nine billion, nine hundred sixty-one million, three hundred fifty-nine thousand, eight hundred ninety-four".