9965394556 has 36 divisors (see below), whose sum is σ = 19302385368. Its totient is φ = 4475072448.

The previous prime is 9965394553. The next prime is 9965394557. The reversal of 9965394556 is 6554935699.

It is a junction number, because it is equal to n+sod(n) for n = 9965394494 and 9965394503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9965394553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1195 + ... + 141181.

Almost surely, 2^9965394556 is an apocalyptic number.

It is an amenable number.

9965394556 is a deficient number, since it is larger than the sum of its proper divisors (9336990812).

9965394556 is a wasteful number, since it uses less digits than its factorization.

9965394556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140078 (or 140039 counting only the distinct ones).

The product of its digits is 39366000, while the sum is 61.

The square root of 9965394556 is about 99826.8228283361. The cubic root of 9965394556 is about 2151.9466455243.

The spelling of 9965394556 in words is "nine billion, nine hundred sixty-five million, three hundred ninety-four thousand, five hundred fifty-six".