12605545215 has 40 divisors (see below), whose sum is σ = 22605491040. Its totient is φ = 6720314688.

The previous prime is 12605545189. The next prime is 12605545273. The reversal of 12605545215 is 51254550621.

12605545215 is a `hidden beast` number, since 1 + 2 + 605 + 5 + 45 + 2 + 1 + 5 = 666.

It is not a de Polignac number, because 12605545215 - 2⁶ = 12605545151 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12605545215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1456521 + ... + 1465149.

It is an arithmetic number, because the mean of its divisors is an integer number (565137276).

Almost surely, 2^12605545215 is an apocalyptic number.

12605545215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12605545215 is a deficient number, since it is larger than the sum of its proper divisors (9999945825).

12605545215 is an equidigital number, since it uses as much as digits as its factorization.

12605545215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12253 (or 12244 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

The spelling of 12605545215 in words is "twelve billion, six hundred five million, five hundred forty-five thousand, two hundred fifteen".