26100856261 has 2 divisors, whose sum is σ = 26100856262. Its totient is φ = 26100856260.

The previous prime is 26100856253. The next prime is 26100856289. The reversal of 26100856261 is 16265800162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25442164036 + 658692225 = 159506^2 + 25665^2 .

It is a cyclic number.

It is not a de Polignac number, because 26100856261 - 2³ = 26100856253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26100856261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26100856241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13050428130 + 13050428131.

It is an arithmetic number, because the mean of its divisors is an integer number (13050428131).

Almost surely, 2^26100856261 is an apocalyptic number.

It is an amenable number.

26100856261 is a deficient number, since it is larger than the sum of its proper divisors (1).

26100856261 is an equidigital number, since it uses as much as digits as its factorization.

26100856261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 26100856261 in words is "twenty-six billion, one hundred million, eight hundred fifty-six thousand, two hundred sixty-one".