12345566779011 has 8 divisors (see below), whose sum is σ = 16483972570960. Its totient is φ = 8218769419872.

The previous prime is 12345566778991. The next prime is 12345566779031. The reversal of 12345566779011 is 11097766554321.

It is an interprime number because it is at equal distance from previous prime (12345566778991) and next prime (12345566779031).

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

It is a de Polignac number, because none of the positive numbers 2^k-12345566779011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12345566779031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2902105720 + ... + 2902109973.

It is an arithmetic number, because the mean of its divisors is an integer number (2060496571370).

Almost surely, 2^{12345566779011} is an apocalyptic number.

12345566779011 is a deficient number, since it is larger than the sum of its proper divisors (4138405791949).

12345566779011 is an equidigital number, since it uses as much as digits as its factorization.

12345566779011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5804216405.

The product of its (nonzero) digits is 9525600, while the sum is 57.

The spelling of 12345566779011 in words is "twelve trillion, three hundred forty-five billion, five hundred sixty-six million, seven hundred seventy-nine thousand, eleven".