28027561311906 has 32 divisors (see below), whose sum is σ = 60378345924288. Its totient is φ = 8622252048960.

The previous prime is 28027561311881. The next prime is 28027561311913. The reversal of 28027561311906 is 60911316572082.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33183805 + ... + 34017936.

It is an arithmetic number, because the mean of its divisors is an integer number (1886823310134).

Almost surely, 2^{28027561311906} is an apocalyptic number.

28027561311906 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28027561311906 is an abundant number, since it is smaller than the sum of its proper divisors (32350784612382).

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

28027561311906 is a wasteful number, since it uses less digits than its factorization.

28027561311906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67207106.

The product of its (nonzero) digits is 1088640, while the sum is 51.

Adding to 28027561311906 its reverse (60911316572082), we get a palindrome (88938877883988).

The spelling of 28027561311906 in words is "twenty-eight trillion, twenty-seven billion, five hundred sixty-one million, three hundred eleven thousand, nine hundred six".