8554616640 has 168 divisors, whose sum is σ = 30050841600. Its totient is φ = 2232658944.

The previous prime is 8554616569. The next prime is 8554616641. The reversal of 8554616640 is 466164558.

8554616640 is a `hidden beast` number, since 8 + 5 + 546 + 1 + 66 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8554616641) 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, 103761 + ... + 166959.

Almost surely, 2^8554616640 is an apocalyptic number.

8554616640 is a gapful number since it is divisible by the number (80) 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 8554616640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15025420800).

8554616640 is an abundant number, since it is smaller than the sum of its proper divisors (21496224960).

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

8554616640 is a wasteful number, since it uses less digits than its factorization.

8554616640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63269 (or 63256 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The square root of 8554616640 is about 92491.1706056313. The cubic root of 8554616640 is about 2045.1893257524.

The spelling of 8554616640 in words is "eight billion, five hundred fifty-four million, six hundred sixteen thousand, six hundred forty".