12401312565 has 16 divisors (see below), whose sum is σ = 19854028800. Its totient is φ = 6610057152.

The previous prime is 12401312563. The next prime is 12401312587. The reversal of 12401312565 is 56521310421.

It is not a de Polignac number, because 12401312565 - 2¹ = 12401312563 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12401312563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222645 + ... + 272714.

It is an arithmetic number, because the mean of its divisors is an integer number (1240876800).

Almost surely, 2^12401312565 is an apocalyptic number.

12401312565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12401312565 is a deficient number, since it is larger than the sum of its proper divisors (7452716235).

12401312565 is a wasteful number, since it uses less digits than its factorization.

12401312565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497036.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 12401312565 its reverse (56521310421), we get a palindrome (68922622986).

The spelling of 12401312565 in words is "twelve billion, four hundred one million, three hundred twelve thousand, five hundred sixty-five".