28027561311912 has 32 divisors (see below), whose sum is σ = 70070683636800. Its totient is φ = 9342283056384.

The previous prime is 28027561311881. The next prime is 28027561311913. The reversal of 28027561311912 is 21911316572082.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28027561311913) 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, 13870788 + ... + 15762419.

It is an arithmetic number, because the mean of its divisors is an integer number (2189708863650).

Almost surely, 2^{28027561311912} is an apocalyptic number.

It is an amenable number.

28027561311912 is an abundant number, since it is smaller than the sum of its proper divisors (42043122324888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28027561311912 is a wasteful number, since it uses less digits than its factorization.

28027561311912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29672625 (or 29672621 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 48.

Adding to 28027561311912 its reverse (21911316572082), we get a palindrome (49938877883994).

The spelling of 28027561311912 in words is "twenty-eight trillion, twenty-seven billion, five hundred sixty-one million, three hundred eleven thousand, nine hundred twelve".