8728657928651 has 8 divisors (see below), whose sum is σ = 8840560451520. Its totient is φ = 8616790735488.

The previous prime is 8728657928633. The next prime is 8728657928659. The reversal of 8728657928651 is 1568297568278.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8728657928651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8728657928659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8334956 + ... + 9323561.

It is an arithmetic number, because the mean of its divisors is an integer number (1105070056440).

Almost surely, 2^{8728657928651} is an apocalyptic number.

8728657928651 is a deficient number, since it is larger than the sum of its proper divisors (111902522869).

8728657928651 is a wasteful number, since it uses less digits than its factorization.

8728657928651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17664853.

The product of its digits is 812851200, while the sum is 74.

The spelling of 8728657928651 in words is "eight trillion, seven hundred twenty-eight billion, six hundred fifty-seven million, nine hundred twenty-eight thousand, six hundred fifty-one".