26395125821 has 2 divisors, whose sum is σ = 26395125822. Its totient is φ = 26395125820.

The previous prime is 26395125797. The next prime is 26395125847. The reversal of 26395125821 is 12852159362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26066102500 + 329023321 = 161450^2 + 18139^2 .

It is a cyclic number.

It is not a de Polignac number, because 26395125821 - 2¹⁰ = 26395124797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26395121821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13197562910 + 13197562911.

It is an arithmetic number, because the mean of its divisors is an integer number (13197562911).

Almost surely, 2^26395125821 is an apocalyptic number.

It is an amenable number.

26395125821 is a deficient number, since it is larger than the sum of its proper divisors (1).

26395125821 is an equidigital number, since it uses as much as digits as its factorization.

26395125821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 259200, while the sum is 44.

The spelling of 26395125821 in words is "twenty-six billion, three hundred ninety-five million, one hundred twenty-five thousand, eight hundred twenty-one".