8118215040 has 128 divisors (see below), whose sum is σ = 27867420000. Its totient is φ = 1998323712.

The previous prime is 8118215009. The next prime is 8118215041. The reversal of 8118215040 is 405128118.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 8118214989 and 8118215007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8118215041) 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 15 ways as a sum of consecutive naturals, for example, 137665 + ... + 187584.

Almost surely, 2^8118215040 is an apocalyptic number.

8118215040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8118215040 is an abundant number, since it is smaller than the sum of its proper divisors (19749204960).

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

8118215040 is a wasteful number, since it uses less digits than its factorization.

8118215040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325284 (or 325272 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 30.

The square root of 8118215040 is about 90101.1378396522. The cubic root of 8118215040 is about 2009.8031242036.

The spelling of 8118215040 in words is "eight billion, one hundred eighteen million, two hundred fifteen thousand, forty".