12915567785 has 8 divisors (see below), whose sum is σ = 15509581440. Its totient is φ = 10325187504.

The previous prime is 12915567673. The next prime is 12915567829. The reversal of 12915567785 is 58776551921.

12915567785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 12915567785 - 2¹⁴ = 12915551401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12915567785.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 900515 + ... + 914744.

It is an arithmetic number, because the mean of its divisors is an integer number (1938697680).

Almost surely, 2^12915567785 is an apocalyptic number.

It is an amenable number.

12915567785 is a deficient number, since it is larger than the sum of its proper divisors (2594013655).

12915567785 is a wasteful number, since it uses less digits than its factorization.

12915567785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1816687.

The product of its digits is 5292000, while the sum is 56.

The spelling of 12915567785 in words is "twelve billion, nine hundred fifteen million, five hundred sixty-seven thousand, seven hundred eighty-five".