28255371481 has 2 divisors, whose sum is σ = 28255371482. Its totient is φ = 28255371480.

The previous prime is 28255371479. The next prime is 28255371491. The reversal of 28255371481 is 18417355282.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24340992256 + 3914379225 = 156016^2 + 62565^2 .

It is a cyclic number.

It is not a de Polignac number, because 28255371481 - 2¹ = 28255371479 is a prime.

It is a super-2 number, since 2×28255371481² (a number of 22 digits) contains 22 as substring.

Together with 28255371479, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28255371401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14127685740 + 14127685741.

It is an arithmetic number, because the mean of its divisors is an integer number (14127685741).

Almost surely, 2^28255371481 is an apocalyptic number.

It is an amenable number.

28255371481 is a deficient number, since it is larger than the sum of its proper divisors (1).

28255371481 is an equidigital number, since it uses as much as digits as its factorization.

28255371481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 537600, while the sum is 46.

The spelling of 28255371481 in words is "twenty-eight billion, two hundred fifty-five million, three hundred seventy-one thousand, four hundred eighty-one".