9901129563 has 24 divisors (see below), whose sum is σ = 15424764992. Its totient is φ = 6083900928.

The previous prime is 9901129549. The next prime is 9901129571. The reversal of 9901129563 is 3659211099.

It is a happy number.

It is not a de Polignac number, because 9901129563 - 2⁵ = 9901129531 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (9901129363) 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, 15870 + ... + 141612.

Almost surely, 2^9901129563 is an apocalyptic number.

9901129563 is a deficient number, since it is larger than the sum of its proper divisors (5523635429).

9901129563 is a wasteful number, since it uses less digits than its factorization.

9901129563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126435 (or 126432 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 45.

The square root of 9901129563 is about 99504.4198164082. The cubic root of 9901129563 is about 2147.3108302439.

The spelling of 9901129563 in words is "nine billion, nine hundred one million, one hundred twenty-nine thousand, five hundred sixty-three".