28552855808505 has 16 divisors (see below), whose sum is σ = 52210936335744. Its totient is φ = 13052734083840.

The previous prime is 28552855808501. The next prime is 28552855808507. The reversal of 28552855808505 is 50580855825582.

It is not a de Polignac number, because 28552855808505 - 2² = 28552855808501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28552855808501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135965979936 + ... + 135965980145.

It is an arithmetic number, because the mean of its divisors is an integer number (3263183520984).

Almost surely, 2^{28552855808505} is an apocalyptic number.

It is an amenable number.

28552855808505 is a deficient number, since it is larger than the sum of its proper divisors (23658080527239).

28552855808505 is a wasteful number, since it uses less digits than its factorization.

28552855808505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271931960096.

The product of its (nonzero) digits is 256000000, while the sum is 66.

The spelling of 28552855808505 in words is "twenty-eight trillion, five hundred fifty-two billion, eight hundred fifty-five million, eight hundred eight thousand, five hundred five".