12315348728505 has 24 divisors (see below), whose sum is σ = 21352105050120. Its totient is φ = 6566493500160.

The previous prime is 12315348728489. The next prime is 12315348728563. The reversal of 12315348728505 is 50582784351321.

12315348728505 is a `hidden beast` number, since 1 + 2 + 3 + 1 + 5 + 34 + 87 + 28 + 505 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1045013463081 + 11270335265424 = 1022259^2 + 3357132^2 .

It is not a de Polignac number, because 12315348728505 - 2⁴ = 12315348728489 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35083590 + ... + 35432879.

It is an arithmetic number, because the mean of its divisors is an integer number (889671043755).

Almost surely, 2^{12315348728505} is an apocalyptic number.

12315348728505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12315348728505 is a deficient number, since it is larger than the sum of its proper divisors (9036756321615).

12315348728505 is a wasteful number, since it uses less digits than its factorization.

12315348728505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70520361 (or 70520358 counting only the distinct ones).

The product of its (nonzero) digits is 8064000, while the sum is 54.

The spelling of 12315348728505 in words is "twelve trillion, three hundred fifteen billion, three hundred forty-eight million, seven hundred twenty-eight thousand, five hundred five".