215688305896 has 32 divisors (see below), whose sum is σ = 462872010240. Its totient is φ = 92301288768.

The previous prime is 215688305891. The next prime is 215688305993. The reversal of 215688305896 is 698503886512.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (215688305891) 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, 2806680 + ... + 2882503.

It is an arithmetic number, because the mean of its divisors is an integer number (14464750320).

Almost surely, 2^215688305896 is an apocalyptic number.

It is an amenable number.

215688305896 is an abundant number, since it is smaller than the sum of its proper divisors (247183704344).

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

215688305896 is a wasteful number, since it uses less digits than its factorization.

215688305896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5689873 (or 5689869 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 61.

The spelling of 215688305896 in words is "two hundred fifteen billion, six hundred eighty-eight million, three hundred five thousand, eight hundred ninety-six".