25004531491 has 2 divisors, whose sum is σ = 25004531492. Its totient is φ = 25004531490.

The previous prime is 25004531483. The next prime is 25004531501. The reversal of 25004531491 is 19413540052.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25004531491 - 2³ = 25004531483 is a prime.

It is not a weakly prime, because it can be changed into another prime (25004531471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12502265745 + 12502265746.

It is an arithmetic number, because the mean of its divisors is an integer number (12502265746).

Almost surely, 2^25004531491 is an apocalyptic number.

25004531491 is a deficient number, since it is larger than the sum of its proper divisors (1).

25004531491 is an equidigital number, since it uses as much as digits as its factorization.

25004531491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 25004531491 in words is "twenty-five billion, four million, five hundred thirty-one thousand, four hundred ninety-one".