25031320073 has 2 divisors, whose sum is σ = 25031320074. Its totient is φ = 25031320072.

The previous prime is 25031320037. The next prime is 25031320121. The reversal of 25031320073 is 37002313052.

Together with previous prime (25031320037) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19771734544 + 5259585529 = 140612^2 + 72523^2 .

It is a cyclic number.

It is not a de Polignac number, because 25031320073 - 2⁶ = 25031320009 is a prime.

It is not a weakly prime, because it can be changed into another prime (25031320273) 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, 12515660036 + 12515660037.

It is an arithmetic number, because the mean of its divisors is an integer number (12515660037).

Almost surely, 2^25031320073 is an apocalyptic number.

It is an amenable number.

25031320073 is a deficient number, since it is larger than the sum of its proper divisors (1).

25031320073 is an equidigital number, since it uses as much as digits as its factorization.

25031320073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 26.

The spelling of 25031320073 in words is "twenty-five billion, thirty-one million, three hundred twenty thousand, seventy-three".