25916325973 has 4 divisors (see below), whose sum is σ = 25916686668. Its totient is φ = 25915965280.

The previous prime is 25916325947. The next prime is 25916326003. The reversal of 25916325973 is 37952361952.

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 7283256964 + 18633069009 = 85342^2 + 136503^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25916325973 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25916325973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25916325943) 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, 31768 + ... + 229873.

It is an arithmetic number, because the mean of its divisors is an integer number (6479171667).

Almost surely, 2^25916325973 is an apocalyptic number.

It is an amenable number.

25916325973 is a deficient number, since it is larger than the sum of its proper divisors (360695).

25916325973 is an equidigital number, since it uses as much as digits as its factorization.

25916325973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360694.

The product of its digits is 3061800, while the sum is 52.

The spelling of 25916325973 in words is "twenty-five billion, nine hundred sixteen million, three hundred twenty-five thousand, nine hundred seventy-three".