9994952556 has 144 divisors (see below), whose sum is σ = 26644415616. Its totient is φ = 3275748864.

The previous prime is 9994952537. The next prime is 9994952557. The reversal of 9994952556 is 6552594999.

9994952556 is a `hidden beast` number, since 9 + 99 + 495 + 2 + 5 + 56 = 666.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

Its product of digits (39366000) is a multiple of the sum of its prime factors (810).

It is a junction number, because it is equal to n+sod(n) for n = 9994952493 and 9994952502.

It is not an unprimeable number, because it can be changed into a prime (9994952557) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21402235 + ... + 21402701.

It is an arithmetic number, because the mean of its divisors is an integer number (185030664).

Almost surely, 2^9994952556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9994952556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13322207808).

9994952556 is an abundant number, since it is smaller than the sum of its proper divisors (16649463060).

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

9994952556 is a wasteful number, since it uses less digits than its factorization.

9994952556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810 (or 796 counting only the distinct ones).

The product of its digits is 39366000, while the sum is 63.

The square root of 9994952556 is about 99974.7595946097. The cubic root of 9994952556 is about 2154.0721494133.

The spelling of 9994952556 in words is "nine billion, nine hundred ninety-four million, nine hundred fifty-two thousand, five hundred fifty-six".