12077105785 has 4 divisors (see below), whose sum is σ = 14492526948. Its totient is φ = 9661684624.

The previous prime is 12077105771. The next prime is 12077105791. The reversal of 12077105785 is 58750177021.

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 6963568704 + 5113537081 = 83448^2 + 71509^2 .

It is a cyclic number.

It is not a de Polignac number, because 12077105785 - 2⁹ = 12077105273 is a prime.

It is a super-3 number, since 3×12077105785³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1207710574 + ... + 1207710583.

It is an arithmetic number, because the mean of its divisors is an integer number (3623131737).

Almost surely, 2^12077105785 is an apocalyptic number.

It is an amenable number.

12077105785 is a deficient number, since it is larger than the sum of its proper divisors (2415421163).

12077105785 is an equidigital number, since it uses as much as digits as its factorization.

12077105785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2415421162.

The product of its (nonzero) digits is 137200, while the sum is 43.

The spelling of 12077105785 in words is "twelve billion, seventy-seven million, one hundred five thousand, seven hundred eighty-five".