12315128548516 has 6 divisors (see below), whose sum is σ = 21551474959910. Its totient is φ = 6157564274256.

The previous prime is 12315128548507. The next prime is 12315128548523. The reversal of 12315128548516 is 61584582151321.

It can be written as a sum of positive squares in only one way, i.e., 6672147302500 + 5642981246016 = 2583050^2 + 2375496^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1539391068561 + ... + 1539391068568.

Almost surely, 2^{12315128548516} is an apocalyptic number.

It is an amenable number.

12315128548516 is a deficient number, since it is larger than the sum of its proper divisors (9236346411394).

12315128548516 is a wasteful number, since it uses less digits than its factorization.

12315128548516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3078782137133 (or 3078782137131 counting only the distinct ones).

The product of its digits is 2304000, while the sum is 52.

The spelling of 12315128548516 in words is "twelve trillion, three hundred fifteen billion, one hundred twenty-eight million, five hundred forty-eight thousand, five hundred sixteen".