12503615161266 has 48 divisors (see below), whose sum is σ = 27161375281560. Its totient is φ = 4157081061120.

The previous prime is 12503615161223. The next prime is 12503615161277. The reversal of 12503615161266 is 66216151630521.

12503615161266 is a `hidden beast` number, since 1 + 2 + 5 + 0 + 3 + 6 + 1 + 516 + 126 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 12383255430225 + 120359731041 = 3518985^2 + 346929^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13554840 + ... + 14447868.

Almost surely, 2^{12503615161266} is an apocalyptic number.

12503615161266 is an abundant number, since it is smaller than the sum of its proper divisors (14657760120294).

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

12503615161266 is a wasteful number, since it uses less digits than its factorization.

12503615161266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895051 (or 895048 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

Adding to 12503615161266 its reverse (66216151630521), we get a palindrome (78719766791787).

The spelling of 12503615161266 in words is "twelve trillion, five hundred three billion, six hundred fifteen million, one hundred sixty-one thousand, two hundred sixty-six".