28889669663 has 2 divisors, whose sum is σ = 28889669664. Its totient is φ = 28889669662.

The previous prime is 28889669629. The next prime is 28889669687. The reversal of 28889669663 is 36696698882.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28889669663 - 2¹⁴ = 28889653279 is a prime.

It is a super-2 number, since 2×28889669663² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28889669623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14444834831 + 14444834832.

It is an arithmetic number, because the mean of its divisors is an integer number (14444834832).

Almost surely, 2^28889669663 is an apocalyptic number.

28889669663 is a deficient number, since it is larger than the sum of its proper divisors (1).

28889669663 is an equidigital number, since it uses as much as digits as its factorization.

28889669663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 322486272, while the sum is 71.

The spelling of 28889669663 in words is "twenty-eight billion, eight hundred eighty-nine million, six hundred sixty-nine thousand, six hundred sixty-three".