26428571693 has 2 divisors, whose sum is σ = 26428571694. Its totient is φ = 26428571692.

The previous prime is 26428571681. The next prime is 26428571713. The reversal of 26428571693 is 39617582462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23010766249 + 3417805444 = 151693^2 + 58462^2 .

It is a cyclic number.

It is not a de Polignac number, because 26428571693 - 2⁸ = 26428571437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26428571623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13214285846 + 13214285847.

It is an arithmetic number, because the mean of its divisors is an integer number (13214285847).

Almost surely, 2^26428571693 is an apocalyptic number.

It is an amenable number.

26428571693 is a deficient number, since it is larger than the sum of its proper divisors (1).

26428571693 is an equidigital number, since it uses as much as digits as its factorization.

26428571693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 53.

The spelling of 26428571693 in words is "twenty-six billion, four hundred twenty-eight million, five hundred seventy-one thousand, six hundred ninety-three".