28554399997 has 2 divisors, whose sum is σ = 28554399998. Its totient is φ = 28554399996.

The previous prime is 28554399917. The next prime is 28554400027. The reversal of 28554399997 is 79999345582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20993401881 + 7560998116 = 144891^2 + 86954^2 .

It is a cyclic number.

It is not a de Polignac number, because 28554399997 - 2²⁷ = 28420182269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28554399917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14277199998 + 14277199999.

It is an arithmetic number, because the mean of its divisors is an integer number (14277199999).

Almost surely, 2^28554399997 is an apocalyptic number.

It is an amenable number.

28554399997 is a deficient number, since it is larger than the sum of its proper divisors (1).

28554399997 is an equidigital number, since it uses as much as digits as its factorization.

28554399997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 220449600, while the sum is 70.

The spelling of 28554399997 in words is "twenty-eight billion, five hundred fifty-four million, three hundred ninety-nine thousand, nine hundred ninety-seven".