28233664477 has 2 divisors, whose sum is σ = 28233664478. Its totient is φ = 28233664476.

The previous prime is 28233664427. The next prime is 28233664553. The reversal of 28233664477 is 77446633282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20094196516 + 8139467961 = 141754^2 + 90219^2 .

It is a cyclic number.

It is not a de Polignac number, because 28233664477 - 2¹⁵ = 28233631709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28233664427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14116832238 + 14116832239.

It is an arithmetic number, because the mean of its divisors is an integer number (14116832239).

Almost surely, 2^28233664477 is an apocalyptic number.

It is an amenable number.

28233664477 is a deficient number, since it is larger than the sum of its proper divisors (1).

28233664477 is an equidigital number, since it uses as much as digits as its factorization.

28233664477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8128512, while the sum is 52.

The spelling of 28233664477 in words is "twenty-eight billion, two hundred thirty-three million, six hundred sixty-four thousand, four hundred seventy-seven".