28813551667 has 4 divisors (see below), whose sum is σ = 28846258056. Its totient is φ = 28780845280.

The previous prime is 28813551653. The next prime is 28813551713. The reversal of 28813551667 is 76615531882.

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 28813551667 - 2²⁷ = 28679333939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28813551647) 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, 16351873 + ... + 16353634.

It is an arithmetic number, because the mean of its divisors is an integer number (7211564514).

Almost surely, 2^28813551667 is an apocalyptic number.

28813551667 is a deficient number, since it is larger than the sum of its proper divisors (32706389).

28813551667 is an equidigital number, since it uses as much as digits as its factorization.

28813551667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32706388.

The product of its digits is 2419200, while the sum is 52.

The spelling of 28813551667 in words is "twenty-eight billion, eight hundred thirteen million, five hundred fifty-one thousand, six hundred sixty-seven".