215685420459 has 8 divisors (see below), whose sum is σ = 289412284560. Its totient is φ = 142874418336.

The previous prime is 215685420443. The next prime is 215685420481. The reversal of 215685420459 is 954024586512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 215685420459 - 2⁴ = 215685420443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215685421459) 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, 228964944 + ... + 228965885.

It is an arithmetic number, because the mean of its divisors is an integer number (36176535570).

Almost surely, 2^215685420459 is an apocalyptic number.

215685420459 is a deficient number, since it is larger than the sum of its proper divisors (73726864101).

215685420459 is a wasteful number, since it uses less digits than its factorization.

215685420459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457930989.

The product of its (nonzero) digits is 3456000, while the sum is 51.

The spelling of 215685420459 in words is "two hundred fifteen billion, six hundred eighty-five million, four hundred twenty thousand, four hundred fifty-nine".