9749155680 has 384 divisors, whose sum is σ = 37452119040. Its totient is φ = 2348974080.

The previous prime is 9749155657. The next prime is 9749155687. The reversal of 9749155680 is 865519479.

9749155680 is a `hidden beast` number, since 9 + 7 + 4 + 9 + 1 + 556 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9749155687) 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 63 ways as a sum of consecutive naturals, for example, 9170829 + ... + 9171891.

It is an arithmetic number, because the mean of its divisors is an integer number (97531560).

Almost surely, 2^9749155680 is an apocalyptic number.

9749155680 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9749155680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18726059520).

9749155680 is an abundant number, since it is smaller than the sum of its proper divisors (27702963360).

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

9749155680 is a wasteful number, since it uses less digits than its factorization.

9749155680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291 (or 1277 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 54.

The square root of 9749155680 is about 98737.8128175827. The cubic root of 9749155680 is about 2136.2676725530.

The spelling of 9749155680 in words is "nine billion, seven hundred forty-nine million, one hundred fifty-five thousand, six hundred eighty".