8015969561 has 4 divisors (see below), whose sum is σ = 8016196992. Its totient is φ = 8015742132.

The previous prime is 8015969543. The next prime is 8015969581. The reversal of 8015969561 is 1659695108.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8015969561 - 2¹⁴ = 8015953177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8015969531) 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, 48305 + ... + 135518.

It is an arithmetic number, because the mean of its divisors is an integer number (2004049248).

Almost surely, 2^8015969561 is an apocalyptic number.

It is an amenable number.

8015969561 is a deficient number, since it is larger than the sum of its proper divisors (227431).

8015969561 is a wasteful number, since it uses less digits than its factorization.

8015969561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227430.

The product of its (nonzero) digits is 583200, while the sum is 50.

The square root of 8015969561 is about 89531.9471529576. The cubic root of 8015969561 is about 2001.3299122207.

The spelling of 8015969561 in words is "eight billion, fifteen million, nine hundred sixty-nine thousand, five hundred sixty-one".