12551115505 has 8 divisors (see below), whose sum is σ = 15169694400. Its totient is φ = 9968655216.

The previous prime is 12551115491. The next prime is 12551115557. The reversal of 12551115505 is 50551115521.

It is a happy number.

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

It is not a de Polignac number, because 12551115505 - 2⁹ = 12551114993 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9028885 + ... + 9030274.

It is an arithmetic number, because the mean of its divisors is an integer number (1896211800).

Almost surely, 2^12551115505 is an apocalyptic number.

It is an amenable number.

12551115505 is a deficient number, since it is larger than the sum of its proper divisors (2618578895).

12551115505 is a wasteful number, since it uses less digits than its factorization.

12551115505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18059303.

The product of its (nonzero) digits is 6250, while the sum is 31.

The spelling of 12551115505 in words is "twelve billion, five hundred fifty-one million, one hundred fifteen thousand, five hundred five".