12615775887 has 16 divisors (see below), whose sum is σ = 19761775488. Its totient is φ = 7057776480.

The previous prime is 12615775873. The next prime is 12615775943. The reversal of 12615775887 is 78857751621.

It is a happy number.

It is not a de Polignac number, because 12615775887 - 2⁸ = 12615775631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12615775387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14703273 + ... + 14704130.

It is an arithmetic number, because the mean of its divisors is an integer number (1235110968).

Almost surely, 2^12615775887 is an apocalyptic number.

12615775887 is a deficient number, since it is larger than the sum of its proper divisors (7145999601).

12615775887 is a wasteful number, since it uses less digits than its factorization.

12615775887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29407430.

The product of its digits is 6585600, while the sum is 57.

The spelling of 12615775887 in words is "twelve billion, six hundred fifteen million, seven hundred seventy-five thousand, eight hundred eighty-seven".