25513039429 has 2 divisors, whose sum is σ = 25513039430. Its totient is φ = 25513039428.

The previous prime is 25513039417. The next prime is 25513039483. The reversal of 25513039429 is 92493031552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25512714529 + 324900 = 159727^2 + 570^2 .

It is a cyclic number.

It is not a de Polignac number, because 25513039429 - 2⁹ = 25513038917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25513039229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12756519714 + 12756519715.

It is an arithmetic number, because the mean of its divisors is an integer number (12756519715).

Almost surely, 2^25513039429 is an apocalyptic number.

It is an amenable number.

25513039429 is a deficient number, since it is larger than the sum of its proper divisors (1).

25513039429 is an equidigital number, since it uses as much as digits as its factorization.

25513039429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 291600, while the sum is 43.

The spelling of 25513039429 in words is "twenty-five billion, five hundred thirteen million, thirty-nine thousand, four hundred twenty-nine".