8180513840 has 40 divisors (see below), whose sum is σ = 20020734960. Its totient is φ = 3099983616.

The previous prime is 8180513791. The next prime is 8180513867. The reversal of 8180513840 is 483150818.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 8180513794 and 8180513803.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2689439 + ... + 2692478.

It is an arithmetic number, because the mean of its divisors is an integer number (500518374).

Almost surely, 2^8180513840 is an apocalyptic number.

8180513840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8180513840 is an abundant number, since it is smaller than the sum of its proper divisors (11840221120).

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

8180513840 is a wasteful number, since it uses less digits than its factorization.

8180513840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5381949 (or 5381943 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 8180513840 is about 90446.1930652695. The cubic root of 8180513840 is about 2014.9310741221.

The spelling of 8180513840 in words is "eight billion, one hundred eighty million, five hundred thirteen thousand, eight hundred forty".