12505551515 has 8 divisors (see below), whose sum is σ = 15042479760. Its totient is φ = 9980562592.

The previous prime is 12505551481. The next prime is 12505551521. The reversal of 12505551515 is 51515550521.

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

It is a cyclic number.

It is not a de Polignac number, because 12505551515 - 2⁶ = 12505551451 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, 2982524 + ... + 2986713.

It is an arithmetic number, because the mean of its divisors is an integer number (1880309970).

Almost surely, 2^12505551515 is an apocalyptic number.

12505551515 is a deficient number, since it is larger than the sum of its proper divisors (2536928245).

12505551515 is an equidigital number, since it uses as much as digits as its factorization.

12505551515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5969661.

The product of its (nonzero) digits is 31250, while the sum is 35.

The spelling of 12505551515 in words is "twelve billion, five hundred five million, five hundred fifty-one thousand, five hundred fifteen".