28126431701 has 2 divisors, whose sum is σ = 28126431702. Its totient is φ = 28126431700.

The previous prime is 28126431649. The next prime is 28126431713. The reversal of 28126431701 is 10713462182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23600640625 + 4525791076 = 153625^2 + 67274^2 .

It is a cyclic number.

It is not a de Polignac number, because 28126431701 - 2²² = 28122237397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28126431721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14063215850 + 14063215851.

It is an arithmetic number, because the mean of its divisors is an integer number (14063215851).

Almost surely, 2^28126431701 is an apocalyptic number.

It is an amenable number.

28126431701 is a deficient number, since it is larger than the sum of its proper divisors (1).

28126431701 is an equidigital number, since it uses as much as digits as its factorization.

28126431701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 35.

Adding to 28126431701 its reverse (10713462182), we get a palindrome (38839893883).

The spelling of 28126431701 in words is "twenty-eight billion, one hundred twenty-six million, four hundred thirty-one thousand, seven hundred one".