18015695880 has 512 divisors, whose sum is σ = 72305049600. Its totient is φ = 3483648000.

The previous prime is 18015695879. The next prime is 18015695909. The reversal of 18015695880 is 8859651081.

It is an unprimeable number.

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 127 ways as a sum of consecutive naturals, for example, 6430480 + ... + 6433280.

It is an arithmetic number, because the mean of its divisors is an integer number (141220800).

Almost surely, 2^18015695880 is an apocalyptic number.

18015695880 is a gapful number since it is divisible by the number (10) 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 18015695880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36152524800).

18015695880 is an abundant number, since it is smaller than the sum of its proper divisors (54289353720).

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

18015695880 is a wasteful number, since it uses less digits than its factorization.

18015695880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2885 (or 2881 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 51.

The spelling of 18015695880 in words is "eighteen billion, fifteen million, six hundred ninety-five thousand, eight hundred eighty".