215645032608 has 48 divisors (see below), whose sum is σ = 566379184896. Its totient is φ = 71842188800.

The previous prime is 215645032607. The next prime is 215645032613. The reversal of 215645032608 is 806230546512.

215645032608 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 215645032608.

It is not an unprimeable number, because it can be changed into a prime (215645032607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 441093 + ... + 791108.

It is an arithmetic number, because the mean of its divisors is an integer number (11799566352).

Almost surely, 2^215645032608 is an apocalyptic number.

It is an amenable number.

215645032608 is an abundant number, since it is smaller than the sum of its proper divisors (350734152288).

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

215645032608 is a wasteful number, since it uses less digits than its factorization.

215645032608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234037 (or 1234029 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 215645032608 in words is "two hundred fifteen billion, six hundred forty-five million, thirty-two thousand, six hundred eight".