12501322538 has 8 divisors (see below), whose sum is σ = 19855041732. Its totient is φ = 5882975296.

The previous prime is 12501322529. The next prime is 12501322567. The reversal of 12501322538 is 83522310521.

It can be written as a sum of positive squares in 2 ways, for example, as 9311671009 + 3189651529 = 96497^2 + 56477^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12501322538² (a number of 21 digits) contains 22 as substring.

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, 183842945 + ... + 183843012.

Almost surely, 2^12501322538 is an apocalyptic number.

12501322538 is a deficient number, since it is larger than the sum of its proper divisors (7353719194).

12501322538 is a wasteful number, since it uses less digits than its factorization.

12501322538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367685976.

The product of its (nonzero) digits is 14400, while the sum is 32.

The spelling of 12501322538 in words is "twelve billion, five hundred one million, three hundred twenty-two thousand, five hundred thirty-eight".