12565566730 has 16 divisors (see below), whose sum is σ = 22624460640. Its totient is φ = 5024795472.

The previous prime is 12565566667. The next prime is 12565566731. The reversal of 12565566730 is 3766556521.

It is not an unprimeable number, because it can be changed into a prime (12565566731) 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, 141660 + ... + 212599.

It is an arithmetic number, because the mean of its divisors is an integer number (1414028790).

Almost surely, 2^12565566730 is an apocalyptic number.

12565566730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12565566730 is a deficient number, since it is larger than the sum of its proper divisors (10058893910).

12565566730 is a wasteful number, since it uses less digits than its factorization.

12565566730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357813.

The product of its (nonzero) digits is 1134000, while the sum is 46.

The spelling of 12565566730 in words is "twelve billion, five hundred sixty-five million, five hundred sixty-six thousand, seven hundred thirty".