12745253538 has 12 divisors (see below), whose sum is σ = 27614716038. Its totient is φ = 4248417840.

The previous prime is 12745253537. The next prime is 12745253551. The reversal of 12745253538 is 83535254721.

12745253538 is a `hidden beast` number, since 1 + 2 + 74 + 525 + 3 + 53 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12387022209 + 358231329 = 111297^2 + 18927^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12745253493 and 12745253502.

It is not an unprimeable number, because it can be changed into a prime (12745253537) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 354034803 + ... + 354034838.

Almost surely, 2^12745253538 is an apocalyptic number.

12745253538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12745253538 is an abundant number, since it is smaller than the sum of its proper divisors (14869462500).

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

12745253538 is a wasteful number, since it uses less digits than its factorization.

12745253538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708069649 (or 708069646 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 45.

The spelling of 12745253538 in words is "twelve billion, seven hundred forty-five million, two hundred fifty-three thousand, five hundred thirty-eight".