8069608561 has 27 divisors (see below), whose sum is σ = 9652471713. Its totient is φ = 6726545280.

The previous prime is 8069608549. The next prime is 8069608567. The reversal of 8069608561 is 1658069608.

The square root of 8069608561 is 89831.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 7359066225 + 710542336 = 85785^2 + 26656^2 .

It is not a de Polignac number, because 8069608561 - 2¹¹ = 8069606513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8069608567) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 25781341 + ... + 25781653.

Almost surely, 2^8069608561 is an apocalyptic number.

8069608561 is the 89831-st square number.

8069608561 is the 44916-th centered octagonal number.

It is an amenable number.

8069608561 is a deficient number, since it is larger than the sum of its proper divisors (1582863152).

8069608561 is an frugal number, since it uses more digits than its factorization.

8069608561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722 (or 361 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 49.

The cubic root of 8069608561 is about 2005.7839701365.

Multiplying 8069608561 by its sum of digits (49), we get a square (395410819489 = 628817²).

8069608561 divided by its sum of digits (49) gives a square (164685889 = 12833²).

The spelling of 8069608561 in words is "eight billion, sixty-nine million, six hundred eight thousand, five hundred sixty-one".