9965394558 has 48 divisors (see below), whose sum is σ = 24737877216. Its totient is φ = 2840140800.

The previous prime is 9965394557. The next prime is 9965394559. The reversal of 9965394558 is 8554935699.

9965394558 is a `hidden beast` number, since 9 + 9 + 6 + 539 + 45 + 58 = 666.

It is an interprime number because it is at equal distance from previous prime (9965394557) and next prime (9965394559).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 9965394495 and 9965394504.

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 23 ways as a sum of consecutive naturals, for example, 48091 + ... + 149142.

It is an arithmetic number, because the mean of its divisors is an integer number (515372442).

Almost surely, 2^9965394558 is an apocalyptic number.

9965394558 is an abundant number, since it is smaller than the sum of its proper divisors (14772482658).

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

9965394558 is a wasteful number, since it uses less digits than its factorization.

9965394558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197649 (or 197646 counting only the distinct ones).

The product of its digits is 52488000, while the sum is 63.

The square root of 9965394558 is about 99826.8228383534. The cubic root of 9965394558 is about 2151.9466456682.

The spelling of 9965394558 in words is "nine billion, nine hundred sixty-five million, three hundred ninety-four thousand, five hundred fifty-eight".