8518991040 has 1008 divisors, whose sum is σ = 37320577632. Its totient is φ = 1771241472.

The previous prime is 8518991017. The next prime is 8518991081. The reversal of 8518991040 is 401998158.

8518991040 is a `hidden beast` number, since 8 + 518 + 9 + 91 + 0 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (1008).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 127149087 + ... + 127149153.

Almost surely, 2^8518991040 is an apocalyptic number.

8518991040 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 8518991040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18660288816).

8518991040 is an abundant number, since it is smaller than the sum of its proper divisors (28801586592).

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

8518991040 is a wasteful number, since it uses less digits than its factorization.

8518991040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The square root of 8518991040 is about 92298.3804841667. The cubic root of 8518991040 is about 2042.3463199373.

The spelling of 8518991040 in words is "eight billion, five hundred eighteen million, nine hundred ninety-one thousand, forty".