12565740371 has 4 divisors (see below), whose sum is σ = 12690153744. Its totient is φ = 12441327000.

The previous prime is 12565740367. The next prime is 12565740433. The reversal of 12565740371 is 17304756521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12565740371 - 2² = 12565740367 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12565740361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62206535 + ... + 62206736.

It is an arithmetic number, because the mean of its divisors is an integer number (3172538436).

Almost surely, 2^12565740371 is an apocalyptic number.

12565740371 is a deficient number, since it is larger than the sum of its proper divisors (124413373).

12565740371 is a wasteful number, since it uses less digits than its factorization.

12565740371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124413372.

The product of its (nonzero) digits is 176400, while the sum is 41.

The spelling of 12565740371 in words is "twelve billion, five hundred sixty-five million, seven hundred forty thousand, three hundred seventy-one".