12565146452 has 6 divisors (see below), whose sum is σ = 21989006298. Its totient is φ = 6282573224.

The previous prime is 12565146409. The next prime is 12565146497. The reversal of 12565146452 is 25464156521.

It can be written as a sum of positive squares in only one way, i.e., 6718097296 + 5847049156 = 81964^2 + 76466^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1570643303 + ... + 1570643310.

It is an arithmetic number, because the mean of its divisors is an integer number (3664834383).

Almost surely, 2^12565146452 is an apocalyptic number.

It is an amenable number.

12565146452 is a deficient number, since it is larger than the sum of its proper divisors (9423859846).

12565146452 is a wasteful number, since it uses less digits than its factorization.

12565146452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3141286617 (or 3141286615 counting only the distinct ones).

The product of its digits is 288000, while the sum is 41.

The spelling of 12565146452 in words is "twelve billion, five hundred sixty-five million, one hundred forty-six thousand, four hundred fifty-two".