25994534307829 has 2 divisors, whose sum is σ = 25994534307830. Its totient is φ = 25994534307828.

The previous prime is 25994534307823. The next prime is 25994534307943. The reversal of 25994534307829 is 92870343549952.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24718775352804 + 1275758955025 = 4971798^2 + 1129495^2 .

It is a cyclic number.

It is not a de Polignac number, because 25994534307829 - 2¹¹ = 25994534305781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25994534307823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12997267153914 + 12997267153915.

It is an arithmetic number, because the mean of its divisors is an integer number (12997267153915).

Almost surely, 2^{25994534307829} is an apocalyptic number.

It is an amenable number.

25994534307829 is a deficient number, since it is larger than the sum of its proper divisors (1).

25994534307829 is an equidigital number, since it uses as much as digits as its factorization.

25994534307829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 587865600, while the sum is 70.

The spelling of 25994534307829 in words is "twenty-five trillion, nine hundred ninety-four billion, five hundred thirty-four million, three hundred seven thousand, eight hundred twenty-nine".