25919091073 has 4 divisors (see below), whose sum is σ = 26551264068. Its totient is φ = 25286918080.

The previous prime is 25919091047. The next prime is 25919091097. The reversal of 25919091073 is 37019091952.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5024966769 + 20894124304 = 70887^2 + 144548^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25919091073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25919091043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316086436 + ... + 316086517.

It is an arithmetic number, because the mean of its divisors is an integer number (6637816017).

Almost surely, 2^25919091073 is an apocalyptic number.

It is an amenable number.

25919091073 is a deficient number, since it is larger than the sum of its proper divisors (632172995).

25919091073 is an equidigital number, since it uses as much as digits as its factorization.

25919091073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632172994.

The product of its (nonzero) digits is 153090, while the sum is 46.

The spelling of 25919091073 in words is "twenty-five billion, nine hundred nineteen million, ninety-one thousand, seventy-three".