9551791872 has 648 divisors, whose sum is σ = 34745015760. Its totient is φ = 2508226560.

The previous prime is 9551791867. The next prime is 9551791919. The reversal of 9551791872 is 2781971559.

9551791872 is a `hidden beast` number, since 9 + 551 + 7 + 9 + 1 + 87 + 2 = 666.

Its product of digits (1587600) is a multiple of the sum of its prime factors (189).

It is a congruent number.

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 130846428 + ... + 130846500.

Almost surely, 2^9551791872 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 9551791872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17372507880).

9551791872 is an abundant number, since it is smaller than the sum of its proper divisors (25193223888).

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

9551791872 is a wasteful number, since it uses less digits than its factorization.

9551791872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189 (or 165 counting only the distinct ones).

The product of its digits is 1587600, while the sum is 54.

The square root of 9551791872 is about 97733.2690131666. The cubic root of 9551791872 is about 2121.7536125407.

The spelling of 9551791872 in words is "nine billion, five hundred fifty-one million, seven hundred ninety-one thousand, eight hundred seventy-two".