816215466072225 has 48 divisors (see below), whose sum is σ = 1378202558319360. Its totient is φ = 426048549043200.

The previous prime is 816215466072197. The next prime is 816215466072289. The reversal of 816215466072225 is 522270664512618.

It is not a de Polignac number, because 816215466072225 - 2²³ = 816215457683617 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 360045081 + ... + 362304969.

It is an arithmetic number, because the mean of its divisors is an integer number (28712553298320).

Almost surely, 2^{816215466072225} is an apocalyptic number.

It is an amenable number.

816215466072225 is a deficient number, since it is larger than the sum of its proper divisors (561987092247135).

816215466072225 is a wasteful number, since it uses less digits than its factorization.

816215466072225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2362410 (or 2362405 counting only the distinct ones).

The product of its (nonzero) digits is 19353600, while the sum is 57.

The spelling of 816215466072225 in words is "eight hundred sixteen trillion, two hundred fifteen billion, four hundred sixty-six million, seventy-two thousand, two hundred twenty-five".