215743039688 has 36 divisors (see below), whose sum is σ = 444665492145. Its totient is φ = 98058449280.

The previous prime is 215743039679. The next prime is 215743039693. The reversal of 215743039688 is 886930347512.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 181989266404 + 33753773284 = 426602^2 + 183722^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=328438.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 14443808 + ... + 14458736.

It is a 1-persistent number, because it is pandigital, but 2⋅215743039688 = 431486079376 is not.

Almost surely, 2^215743039688 is an apocalyptic number.

It is an amenable number.

215743039688 is an abundant number, since it is smaller than the sum of its proper divisors (228922452457).

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

215743039688 is an frugal number, since it uses more digits than its factorization.

215743039688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29886 (or 14942 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 56.

The spelling of 215743039688 in words is "two hundred fifteen billion, seven hundred forty-three million, thirty-nine thousand, six hundred eighty-eight".