28202026687481 has 2 divisors, whose sum is σ = 28202026687482. Its totient is φ = 28202026687480.

The previous prime is 28202026687477. The next prime is 28202026687511. The reversal of 28202026687481 is 18478662020282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27882254533225 + 319772154256 = 5280365^2 + 565484^2 .

It is a cyclic number.

It is not a de Polignac number, because 28202026687481 - 2² = 28202026687477 is a prime.

It is a super-2 number, since 2×28202026687481² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28202026687421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14101013343740 + 14101013343741.

It is an arithmetic number, because the mean of its divisors is an integer number (14101013343741).

Almost surely, 2^{28202026687481} is an apocalyptic number.

It is an amenable number.

28202026687481 is a deficient number, since it is larger than the sum of its proper divisors (1).

28202026687481 is an equidigital number, since it uses as much as digits as its factorization.

28202026687481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8257536, while the sum is 56.

The spelling of 28202026687481 in words is "twenty-eight trillion, two hundred two billion, twenty-six million, six hundred eighty-seven thousand, four hundred eighty-one".