215266346328 has 128 divisors (see below), whose sum is σ = 617464166400. Its totient is φ = 61936742400.

The previous prime is 215266346299. The next prime is 215266346353. The reversal of 215266346328 is 823643662512.

It is a super-2 number, since 2×215266346328² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 185608 + ... + 681896.

It is an arithmetic number, because the mean of its divisors is an integer number (4823938800).

Almost surely, 2^215266346328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215266346328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308732083200).

215266346328 is an abundant number, since it is smaller than the sum of its proper divisors (402197820072).

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

215266346328 is a wasteful number, since it uses less digits than its factorization.

215266346328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496393 (or 496389 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 48.

The spelling of 215266346328 in words is "two hundred fifteen billion, two hundred sixty-six million, three hundred forty-six thousand, three hundred twenty-eight".