215516123389 has 8 divisors (see below), whose sum is σ = 246947235840. Its totient is φ = 184245784656.

The previous prime is 215516123377. The next prime is 215516123413. The reversal of 215516123389 is 983321615512.

215516123389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 215516123389 - 2¹⁷ = 215515992317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215516123309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40190554 + ... + 40195915.

It is an arithmetic number, because the mean of its divisors is an integer number (30868404480).

Almost surely, 2^215516123389 is an apocalyptic number.

It is an amenable number.

215516123389 is a deficient number, since it is larger than the sum of its proper divisors (31431112451).

215516123389 is an equidigital number, since it uses as much as digits as its factorization.

215516123389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80386859.

The product of its digits is 388800, while the sum is 46.

The spelling of 215516123389 in words is "two hundred fifteen billion, five hundred sixteen million, one hundred twenty-three thousand, three hundred eighty-nine".