12551136506 has 8 divisors (see below), whose sum is σ = 18935530164. Its totient is φ = 6239293120.

The previous prime is 12551136503. The next prime is 12551136529. The reversal of 12551136506 is 60563115521.

It can be written as a sum of positive squares in 2 ways, for example, as 9837664225 + 2713472281 = 99185^2 + 52091^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12551136503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18137135 + ... + 18137826.

Almost surely, 2^12551136506 is an apocalyptic number.

12551136506 is a deficient number, since it is larger than the sum of its proper divisors (6384393658).

12551136506 is a wasteful number, since it uses less digits than its factorization.

12551136506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36275136.

The product of its (nonzero) digits is 27000, while the sum is 35.

The spelling of 12551136506 in words is "twelve billion, five hundred fifty-one million, one hundred thirty-six thousand, five hundred six".