25025461381 has 2 divisors, whose sum is σ = 25025461382. Its totient is φ = 25025461380.

The previous prime is 25025461369. The next prime is 25025461421. The reversal of 25025461381 is 18316452052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24721272900 + 304188481 = 157230^2 + 17441^2 .

It is a cyclic number.

It is not a de Polignac number, because 25025461381 - 2⁹ = 25025460869 is a prime.

It is a super-2 number, since 2×25025461381² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25025461381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25025461301) 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, 12512730690 + 12512730691.

It is an arithmetic number, because the mean of its divisors is an integer number (12512730691).

Almost surely, 2^25025461381 is an apocalyptic number.

It is an amenable number.

25025461381 is a deficient number, since it is larger than the sum of its proper divisors (1).

25025461381 is an equidigital number, since it uses as much as digits as its factorization.

25025461381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57600, while the sum is 37.

The spelling of 25025461381 in words is "twenty-five billion, twenty-five million, four hundred sixty-one thousand, three hundred eighty-one".