12355312455 has 32 divisors (see below), whose sum is σ = 21970310400. Its totient is φ = 6587906976.

The previous prime is 12355312427. The next prime is 12355312471. The reversal of 12355312455 is 55421355321.

12355312455 is a `hidden beast` number, since 123 + 55 + 31 + 2 + 455 = 666.

It is not a de Polignac number, because 12355312455 - 2⁷ = 12355312327 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 735136 + ... + 751754.

It is an arithmetic number, because the mean of its divisors is an integer number (686572200).

Almost surely, 2^12355312455 is an apocalyptic number.

12355312455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12355312455 is a deficient number, since it is larger than the sum of its proper divisors (9614997945).

12355312455 is a wasteful number, since it uses less digits than its factorization.

12355312455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22140 (or 22134 counting only the distinct ones).

The product of its digits is 90000, while the sum is 36.

Adding to 12355312455 its reverse (55421355321), we get a palindrome (67776667776).

The spelling of 12355312455 in words is "twelve billion, three hundred fifty-five million, three hundred twelve thousand, four hundred fifty-five".