215989438560 has 96 divisors (see below), whose sum is σ = 777561990912. Its totient is φ = 49369013760.

The previous prime is 215989438549. The next prime is 215989438589. The reversal of 215989438560 is 65834989512.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a junction number, because it is equal to n+sod(n) for n = 215989438494 and 215989438503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32137926 + ... + 32144645.

It is an arithmetic number, because the mean of its divisors is an integer number (8099604072).

Almost surely, 2^215989438560 is an apocalyptic number.

215989438560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215989438560 is an abundant number, since it is smaller than the sum of its proper divisors (561572552352).

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

215989438560 is a wasteful number, since it uses less digits than its factorization.

215989438560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64282596 (or 64282588 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 60.

The spelling of 215989438560 in words is "two hundred fifteen billion, nine hundred eighty-nine million, four hundred thirty-eight thousand, five hundred sixty".