215543450255904 has 288 divisors, whose sum is σ = 633629716521984. Its totient is φ = 69430714859520.

The previous prime is 215543450255893. The next prime is 215543450255921. The reversal of 215543450255904 is 409552054345512.

215543450255904 is a `hidden beast` number, since 2 + 1 + 5 + 5 + 4 + 3 + 45 + 0 + 2 + 5 + 590 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 37271906197 + ... + 37271911979.

It is an arithmetic number, because the mean of its divisors is an integer number (2200103182368).

Almost surely, 2^{215543450255904} is an apocalyptic number.

215543450255904 is a gapful number since it is divisible by the number (24) 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 215543450255904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (316814858260992).

215543450255904 is an abundant number, since it is smaller than the sum of its proper divisors (418086266266080).

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

215543450255904 is a wasteful number, since it uses less digits than its factorization.

215543450255904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11080 (or 11069 counting only the distinct ones).

The product of its (nonzero) digits is 21600000, while the sum is 54.

The spelling of 215543450255904 in words is "two hundred fifteen trillion, five hundred forty-three billion, four hundred fifty million, two hundred fifty-five thousand, nine hundred four".