25442229973 has 2 divisors, whose sum is σ = 25442229974. Its totient is φ = 25442229972.

The previous prime is 25442229947. The next prime is 25442230013. The reversal of 25442229973 is 37992224452.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25364384644 + 77845329 = 159262^2 + 8823^2 .

It is a cyclic number.

It is not a de Polignac number, because 25442229973 - 2¹³ = 25442221781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25442227973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12721114986 + 12721114987.

It is an arithmetic number, because the mean of its divisors is an integer number (12721114987).

Almost surely, 2^25442229973 is an apocalyptic number.

It is an amenable number.

25442229973 is a deficient number, since it is larger than the sum of its proper divisors (1).

25442229973 is an equidigital number, since it uses as much as digits as its factorization.

25442229973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 49.

The spelling of 25442229973 in words is "twenty-five billion, four hundred forty-two million, two hundred twenty-nine thousand, nine hundred seventy-three".