12565440854 has 8 divisors (see below), whose sum is σ = 18862901760. Its totient is φ = 6277806936.

The previous prime is 12565440821. The next prime is 12565440869. The reversal of 12565440854 is 45804456521.

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

It is a congruent 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, 2453549 + ... + 2458664.

It is an arithmetic number, because the mean of its divisors is an integer number (2357862720).

Almost surely, 2^12565440854 is an apocalyptic number.

12565440854 is a deficient number, since it is larger than the sum of its proper divisors (6297460906).

12565440854 is a wasteful number, since it uses less digits than its factorization.

12565440854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4913494.

The product of its (nonzero) digits is 768000, while the sum is 44.

The spelling of 12565440854 in words is "twelve billion, five hundred sixty-five million, four hundred forty thousand, eight hundred fifty-four".