28642360158721 has 8 divisors (see below), whose sum is σ = 28792692864000. Its totient is φ = 28492031336160.

The previous prime is 28642360158719. The next prime is 28642360158779. The reversal of 28642360158721 is 12785106324682.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28642360158721 - 2¹ = 28642360158719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28642360188721) 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, 14464125 + ... + 16324693.

It is an arithmetic number, because the mean of its divisors is an integer number (3599086608000).

Almost surely, 2^{28642360158721} is an apocalyptic number.

It is an amenable number.

28642360158721 is a deficient number, since it is larger than the sum of its proper divisors (150332705279).

28642360158721 is a wasteful number, since it uses less digits than its factorization.

28642360158721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1941359.

The product of its (nonzero) digits is 7741440, while the sum is 55.

The spelling of 28642360158721 in words is "twenty-eight trillion, six hundred forty-two billion, three hundred sixty million, one hundred fifty-eight thousand, seven hundred twenty-one".