12745253540 has 12 divisors (see below), whose sum is σ = 26765032476. Its totient is φ = 5098101408.

The previous prime is 12745253537. The next prime is 12745253551. The reversal of 12745253540 is 4535254721.

It can be written as a sum of positive squares in 2 ways, for example, as 1565151844 + 11180101696 = 39562^2 + 105736^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12745253494 and 12745253503.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318631319 + ... + 318631358.

It is an arithmetic number, because the mean of its divisors is an integer number (2230419373).

Almost surely, 2^12745253540 is an apocalyptic number.

12745253540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12745253540 is an abundant number, since it is smaller than the sum of its proper divisors (14019778936).

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

12745253540 is a wasteful number, since it uses less digits than its factorization.

12745253540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637262686 (or 637262684 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 38.

The spelling of 12745253540 in words is "twelve billion, seven hundred forty-five million, two hundred fifty-three thousand, five hundred forty".