12891628792515 has 24 divisors (see below), whose sum is σ = 22672219896144. Its totient is φ = 6250486686400.

The previous prime is 12891628792501. The next prime is 12891628792561. The reversal of 12891628792515 is 51529782619821.

It is a happy number.

It is not a de Polignac number, because 12891628792515 - 2¹⁹ = 12891628268227 is a prime.

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 in 23 ways as a sum of consecutive naturals, for example, 3551411076 + ... + 3551414705.

It is an arithmetic number, because the mean of its divisors is an integer number (944675829006).

Almost surely, 2^{12891628792515} is an apocalyptic number.

12891628792515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12891628792515 is a deficient number, since it is larger than the sum of its proper divisors (9780591103629).

12891628792515 is a wasteful number, since it uses less digits than its factorization.

12891628792515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7102825811 (or 7102825800 counting only the distinct ones).

The product of its digits is 43545600, while the sum is 66.

The spelling of 12891628792515 in words is "twelve trillion, eight hundred ninety-one billion, six hundred twenty-eight million, seven hundred ninety-two thousand, five hundred fifteen".