12064312561 has 8 divisors (see below), whose sum is σ = 14513458880. Its totient is φ = 9796584528.

The previous prime is 12064312553. The next prime is 12064312597. The reversal of 12064312561 is 16521346021.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12064312561 - 2³ = 12064312553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12064312511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45354426 + ... + 45354691.

It is an arithmetic number, because the mean of its divisors is an integer number (1814182360).

Almost surely, 2^12064312561 is an apocalyptic number.

It is an amenable number.

12064312561 is a deficient number, since it is larger than the sum of its proper divisors (2449146319).

12064312561 is an equidigital number, since it uses as much as digits as its factorization.

12064312561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90709143.

The product of its (nonzero) digits is 8640, while the sum is 31.

Adding to 12064312561 its reverse (16521346021), we get a palindrome (28585658582).

The spelling of 12064312561 in words is "twelve billion, sixty-four million, three hundred twelve thousand, five hundred sixty-one".