9899154272 has 48 divisors (see below), whose sum is σ = 22343519520. Its totient is φ = 4229081088.

The previous prime is 9899154271. The next prime is 9899154301. The reversal of 9899154272 is 2724519989.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9899154271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1304 + ... + 140712.

It is an arithmetic number, because the mean of its divisors is an integer number (465489990).

Almost surely, 2^9899154272 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 9899154272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11171759760).

9899154272 is an abundant number, since it is smaller than the sum of its proper divisors (12444365248).

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

9899154272 is a wasteful number, since it uses less digits than its factorization.

9899154272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139743 (or 139735 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 56.

The square root of 9899154272 is about 99494.4936767860. The cubic root of 9899154272 is about 2147.1680234451.

The spelling of 9899154272 in words is "nine billion, eight hundred ninety-nine million, one hundred fifty-four thousand, two hundred seventy-two".