25612321829 has 2 divisors, whose sum is σ = 25612321830. Its totient is φ = 25612321828.

The previous prime is 25612321811. The next prime is 25612321913. The reversal of 25612321829 is 92812321652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21845431204 + 3766890625 = 147802^2 + 61375^2 .

It is a cyclic number.

It is not a de Polignac number, because 25612321829 - 2⁸ = 25612321573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25612321129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12806160914 + 12806160915.

It is an arithmetic number, because the mean of its divisors is an integer number (12806160915).

Almost surely, 2^25612321829 is an apocalyptic number.

It is an amenable number.

25612321829 is a deficient number, since it is larger than the sum of its proper divisors (1).

25612321829 is an equidigital number, since it uses as much as digits as its factorization.

25612321829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 41.

The spelling of 25612321829 in words is "twenty-five billion, six hundred twelve million, three hundred twenty-one thousand, eight hundred twenty-nine".