25876826869 has 2 divisors, whose sum is σ = 25876826870. Its totient is φ = 25876826868.

The previous prime is 25876826849. The next prime is 25876826873. The reversal of 25876826869 is 96862867852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17838807844 + 8038019025 = 133562^2 + 89655^2 .

It is a cyclic number.

It is not a de Polignac number, because 25876826869 - 2⁹ = 25876826357 is a prime.

It is a super-2 number, since 2×25876826869² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25876826809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12938413434 + 12938413435.

It is an arithmetic number, because the mean of its divisors is an integer number (12938413435).

Almost surely, 2^25876826869 is an apocalyptic number.

It is an amenable number.

25876826869 is a deficient number, since it is larger than the sum of its proper divisors (1).

25876826869 is an equidigital number, since it uses as much as digits as its factorization.

25876826869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139345920, while the sum is 67.

The spelling of 25876826869 in words is "twenty-five billion, eight hundred seventy-six million, eight hundred twenty-six thousand, eight hundred sixty-nine".