12438645675 has 24 divisors (see below), whose sum is σ = 20757439296. Its totient is φ = 6571940640.

The previous prime is 12438645673. The next prime is 12438645691. The reversal of 12438645675 is 57654683421.

It is not a de Polignac number, because 12438645675 - 2¹ = 12438645673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12438645671) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 766969 + ... + 783018.

It is an arithmetic number, because the mean of its divisors is an integer number (864893304).

Almost surely, 2^12438645675 is an apocalyptic number.

12438645675 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12438645675 is a deficient number, since it is larger than the sum of its proper divisors (8318793621).

12438645675 is a wasteful number, since it uses less digits than its factorization.

12438645675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1550107 (or 1550102 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 51.

The spelling of 12438645675 in words is "twelve billion, four hundred thirty-eight million, six hundred forty-five thousand, six hundred seventy-five".