8272520785 has 4 divisors (see below), whose sum is σ = 9927024948. Its totient is φ = 6618016624.

The previous prime is 8272520783. The next prime is 8272520813. The reversal of 8272520785 is 5870252728.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2891858176 + 5380662609 = 53776^2 + 73353^2 .

It is a cyclic number.

It is not a de Polignac number, because 8272520785 - 2¹ = 8272520783 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8272520783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 827252074 + ... + 827252083.

It is an arithmetic number, because the mean of its divisors is an integer number (2481756237).

Almost surely, 2^8272520785 is an apocalyptic number.

It is an amenable number.

8272520785 is a deficient number, since it is larger than the sum of its proper divisors (1654504163).

8272520785 is a wasteful number, since it uses less digits than its factorization.

8272520785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1654504162.

The product of its (nonzero) digits is 627200, while the sum is 46.

The square root of 8272520785 is about 90953.3989744199. The cubic root of 8272520785 is about 2022.4569640178.

The spelling of 8272520785 in words is "eight billion, two hundred seventy-two million, five hundred twenty thousand, seven hundred eighty-five".