12355891465 has 16 divisors (see below), whose sum is σ = 15720747408. Its totient is φ = 9290520576.

The previous prime is 12355891423. The next prime is 12355891489. The reversal of 12355891465 is 56419855321.

12355891465 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 2927675664 + 9428215801 = 54108^2 + 97099^2 .

It is a cyclic number.

It is not a de Polignac number, because 12355891465 - 2²⁹ = 11819020553 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36852 + ... + 161461.

It is an arithmetic number, because the mean of its divisors is an integer number (982546713).

Almost surely, 2^12355891465 is an apocalyptic number.

It is an amenable number.

12355891465 is a deficient number, since it is larger than the sum of its proper divisors (3364855943).

12355891465 is a wasteful number, since it uses less digits than its factorization.

12355891465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199068.

The product of its digits is 1296000, while the sum is 49.

The spelling of 12355891465 in words is "twelve billion, three hundred fifty-five million, eight hundred ninety-one thousand, four hundred sixty-five".