28336111767781 has 2 divisors, whose sum is σ = 28336111767782. Its totient is φ = 28336111767780.

The previous prime is 28336111767767. The next prime is 28336111767851. The reversal of 28336111767781 is 18776711163382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22836308200225 + 5499803567556 = 4778735^2 + 2345166^2 .

It is a cyclic number.

It is not a de Polignac number, because 28336111767781 - 2³⁷ = 28198672814309 is a prime.

It is a super-2 number, since 2×28336111767781² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28336111767751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14168055883890 + 14168055883891.

It is an arithmetic number, because the mean of its divisors is an integer number (14168055883891).

Almost surely, 2^{28336111767781} is an apocalyptic number.

It is an amenable number.

28336111767781 is a deficient number, since it is larger than the sum of its proper divisors (1).

28336111767781 is an equidigital number, since it uses as much as digits as its factorization.

28336111767781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14224896, while the sum is 61.

The spelling of 28336111767781 in words is "twenty-eight trillion, three hundred thirty-six billion, one hundred eleven million, seven hundred sixty-seven thousand, seven hundred eighty-one".