12538238265 has 80 divisors (see below), whose sum is σ = 25779853440. Its totient is φ = 5711005440.

The previous prime is 12538238261. The next prime is 12538238287. The reversal of 12538238265 is 56283283521.

12538238265 is a `hidden beast` number, since 1 + 2 + 5 + 382 + 3 + 8 + 265 = 666.

It is not a de Polignac number, because 12538238265 - 2² = 12538238261 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 12538238265.

It is not an unprimeable number, because it can be changed into a prime (12538238261) 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 79 ways as a sum of consecutive naturals, for example, 788766 + ... + 804504.

It is an arithmetic number, because the mean of its divisors is an integer number (322248168).

Almost surely, 2^12538238265 is an apocalyptic number.

12538238265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12538238265 is an abundant number, since it is smaller than the sum of its proper divisors (13241615175).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12538238265 is a wasteful number, since it uses less digits than its factorization.

12538238265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16044 (or 16035 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The spelling of 12538238265 in words is "twelve billion, five hundred thirty-eight million, two hundred thirty-eight thousand, two hundred sixty-five".