25034573581 has 2 divisors, whose sum is σ = 25034573582. Its totient is φ = 25034573580.

The previous prime is 25034573579. The next prime is 25034573633. The reversal of 25034573581 is 18537543052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18575236681 + 6459336900 = 136291^2 + 80370^2 .

It is a cyclic number.

It is not a de Polignac number, because 25034573581 - 2¹ = 25034573579 is a prime.

It is a super-2 number, since 2×25034573581² (a number of 22 digits) contains 22 as substring.

Together with 25034573579, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25034573381) 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, 12517286790 + 12517286791.

It is an arithmetic number, because the mean of its divisors is an integer number (12517286791).

Almost surely, 2^25034573581 is an apocalyptic number.

It is an amenable number.

25034573581 is a deficient number, since it is larger than the sum of its proper divisors (1).

25034573581 is an equidigital number, since it uses as much as digits as its factorization.

25034573581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504000, while the sum is 43.

The spelling of 25034573581 in words is "twenty-five billion, thirty-four million, five hundred seventy-three thousand, five hundred eighty-one".