215549945512 has 64 divisors (see below), whose sum is σ = 449543856960. Its totient is φ = 96058560000.

The previous prime is 215549945509. The next prime is 215549945531.

215549945512 is nontrivially palindromic in base 10.

215549945512 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

Its product of digits (3240000) is a multiple of the sum of its prime divisors (33750).

It is a self number, because there is not a number n which added to its sum of digits gives 215549945512.

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 15 ways as a sum of consecutive naturals, for example, 6667387 + ... + 6699637.

It is an arithmetic number, because the mean of its divisors is an integer number (7024122765).

Almost surely, 2^215549945512 is an apocalyptic number.

215549945512 is a gapful number since it is divisible by the number (22) 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 215549945512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224771928480).

215549945512 is an abundant number, since it is smaller than the sum of its proper divisors (233993911448).

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

215549945512 is a wasteful number, since it uses less digits than its factorization.

215549945512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33754 (or 33750 counting only the distinct ones).

The product of its digits is 3240000, while the sum is 52.

The spelling of 215549945512 in words is "two hundred fifteen billion, five hundred forty-nine million, nine hundred forty-five thousand, five hundred twelve".