15816387225265 has 8 divisors (see below), whose sum is σ = 20705088731328. Its totient is φ = 11502827072880.

The previous prime is 15816387225263. The next prime is 15816387225269. The reversal of 15816387225265 is 56252278361851.

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

It is not a de Polignac number, because 15816387225265 - 2¹ = 15816387225263 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15816387225263) 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, 143785338357 + ... + 143785338466.

It is an arithmetic number, because the mean of its divisors is an integer number (2588136091416).

Almost surely, 2^{15816387225265} is an apocalyptic number.

It is an amenable number.

15816387225265 is a deficient number, since it is larger than the sum of its proper divisors (4888701506063).

15816387225265 is a wasteful number, since it uses less digits than its factorization.

15816387225265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287570676839.

The product of its digits is 48384000, while the sum is 61.

The spelling of 15816387225265 in words is "fifteen trillion, eight hundred sixteen billion, three hundred eighty-seven million, two hundred twenty-five thousand, two hundred sixty-five".