9556497720 has 768 divisors, whose sum is σ = 41429606400. Its totient is φ = 1916006400.

The previous prime is 9556497701. The next prime is 9556497757. The reversal of 9556497720 is 277946559.

9556497720 is a `hidden beast` number, since 9 + 5 + 564 + 9 + 7 + 72 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 28357392 + ... + 28357728.

It is an arithmetic number, because the mean of its divisors is an integer number (53944800).

Almost surely, 2^9556497720 is an apocalyptic number.

9556497720 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 9556497720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20714803200).

9556497720 is an abundant number, since it is smaller than the sum of its proper divisors (31873108680).

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

9556497720 is a wasteful number, since it uses less digits than its factorization.

9556497720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417 (or 396 counting only the distinct ones).

The product of its (nonzero) digits is 4762800, while the sum is 54.

The square root of 9556497720 is about 97757.3410031185. The cubic root of 9556497720 is about 2122.1019943200.

It can be divided in two parts, 955649 and 7720, that added together give a palindrome (963369).

The spelling of 9556497720 in words is "nine billion, five hundred fifty-six million, four hundred ninety-seven thousand, seven hundred twenty".