28563695467638 has 16 divisors (see below), whose sum is σ = 57127485905856. Its totient is φ = 9521215994120.

The previous prime is 28563695467631. The next prime is 28563695467639. The reversal of 28563695467638 is 83676459636582.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28563695467631) 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, 306133 + ... + 7564463.

It is an arithmetic number, because the mean of its divisors is an integer number (3570467869116).

Almost surely, 2^{28563695467638} is an apocalyptic number.

28563695467638 is an abundant number, since it is smaller than the sum of its proper divisors (28563790438218).

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

28563695467638 is a wasteful number, since it uses less digits than its factorization.

28563695467638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7914219.

The product of its digits is 9405849600, while the sum is 78.

The spelling of 28563695467638 in words is "twenty-eight trillion, five hundred sixty-three billion, six hundred ninety-five million, four hundred sixty-seven thousand, six hundred thirty-eight".