28512790669077 has 32 divisors (see below), whose sum is σ = 45275219719296. Its totient is φ = 15732701798400.

The previous prime is 28512790669063. The next prime is 28512790669117. The reversal of 28512790669077 is 77096609721582.

It is not a de Polignac number, because 28512790669077 - 2⁸ = 28512790668821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28512790619077) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 455197324 + ... + 455259957.

It is an arithmetic number, because the mean of its divisors is an integer number (1414850616228).

Almost surely, 2^{28512790669077} is an apocalyptic number.

It is an amenable number.

28512790669077 is a deficient number, since it is larger than the sum of its proper divisors (16762429050219).

28512790669077 is a wasteful number, since it uses less digits than its factorization.

28512790669077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910457381.

The product of its (nonzero) digits is 160030080, while the sum is 69.

The spelling of 28512790669077 in words is "twenty-eight trillion, five hundred twelve billion, seven hundred ninety million, six hundred sixty-nine thousand, seventy-seven".