28808778421801 has 8 divisors (see below), whose sum is σ = 33045810147584. Its totient is φ = 24602119683840.

The previous prime is 28808778421781. The next prime is 28808778421807. The reversal of 28808778421801 is 10812487780882.

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 28808778421801 - 2²⁵ = 28808744867369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28808778421807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7593244920 + ... + 7593248713.

It is an arithmetic number, because the mean of its divisors is an integer number (4130726268448).

Almost surely, 2^{28808778421801} is an apocalyptic number.

It is an amenable number.

28808778421801 is a deficient number, since it is larger than the sum of its proper divisors (4237031725783).

28808778421801 is a wasteful number, since it uses less digits than its factorization.

28808778421801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15186493911.

The product of its (nonzero) digits is 25690112, while the sum is 64.

The spelling of 28808778421801 in words is "twenty-eight trillion, eight hundred eight billion, seven hundred seventy-eight million, four hundred twenty-one thousand, eight hundred one".