28060640851 has 4 divisors (see below), whose sum is σ = 28150868304. Its totient is φ = 27970413400.

The previous prime is 28060640843. The next prime is 28060640857. The reversal of 28060640851 is 15804606082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28060640851 - 2³ = 28060640843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28060640857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45113260 + ... + 45113881.

It is an arithmetic number, because the mean of its divisors is an integer number (7037717076).

Almost surely, 2^28060640851 is an apocalyptic number.

28060640851 is a deficient number, since it is larger than the sum of its proper divisors (90227453).

28060640851 is an equidigital number, since it uses as much as digits as its factorization.

28060640851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90227452.

The product of its (nonzero) digits is 92160, while the sum is 40.

The spelling of 28060640851 in words is "twenty-eight billion, sixty million, six hundred forty thousand, eight hundred fifty-one".