25878862515169 has 2 divisors, whose sum is σ = 25878862515170. Its totient is φ = 25878862515168.

The previous prime is 25878862515073. The next prime is 25878862515173. The reversal of 25878862515169 is 96151526887852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25464770265169 + 414092250000 = 5046263^2 + 643500^2 .

It is a cyclic number.

It is not a de Polignac number, because 25878862515169 - 2²⁷ = 25878728297441 is a prime.

It is a super-2 number, since 2×25878862515169² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25878862510169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12939431257584 + 12939431257585.

It is an arithmetic number, because the mean of its divisors is an integer number (12939431257585).

Almost surely, 2^{25878862515169} is an apocalyptic number.

It is an amenable number.

25878862515169 is a deficient number, since it is larger than the sum of its proper divisors (1).

25878862515169 is an equidigital number, since it uses as much as digits as its factorization.

25878862515169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608000, while the sum is 73.

The spelling of 25878862515169 in words is "twenty-five trillion, eight hundred seventy-eight billion, eight hundred sixty-two million, five hundred fifteen thousand, one hundred sixty-nine".