12728865620854 has 8 divisors (see below), whose sum is σ = 19558988637048. Its totient is φ = 6209202741840.

The previous prime is 12728865620843. The next prime is 12728865620857. The reversal of 12728865620854 is 45802656882721.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12728865620857) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 77615034192 + ... + 77615034355.

It is an arithmetic number, because the mean of its divisors is an integer number (2444873579631).

Almost surely, 2^{12728865620854} is an apocalyptic number.

12728865620854 is a deficient number, since it is larger than the sum of its proper divisors (6830123016194).

12728865620854 is a wasteful number, since it uses less digits than its factorization.

12728865620854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155230068590.

The product of its (nonzero) digits is 103219200, while the sum is 64.

The spelling of 12728865620854 in words is "twelve trillion, seven hundred twenty-eight billion, eight hundred sixty-five million, six hundred twenty thousand, eight hundred fifty-four".