8215489775 has 12 divisors (see below), whose sum is σ = 10188379152. Its totient is φ = 6571635840.

The previous prime is 8215489757. The next prime is 8215489873. The reversal of 8215489775 is 5779845128.

It is not a de Polignac number, because 8215489775 - 2¹⁴ = 8215473391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8215489775.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 326702 + ... + 350948.

It is an arithmetic number, because the mean of its divisors is an integer number (849031596).

Almost surely, 2^8215489775 is an apocalyptic number.

8215489775 is a deficient number, since it is larger than the sum of its proper divisors (1972889377).

8215489775 is a wasteful number, since it uses less digits than its factorization.

8215489775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37810 (or 37805 counting only the distinct ones).

The product of its digits is 5644800, while the sum is 56.

The square root of 8215489775 is about 90639.3390035475. The cubic root of 8215489775 is about 2017.7986160143.

The spelling of 8215489775 in words is "eight billion, two hundred fifteen million, four hundred eighty-nine thousand, seven hundred seventy-five".