25544442073 has 2 divisors, whose sum is σ = 25544442074. Its totient is φ = 25544442072.

The previous prime is 25544442047. The next prime is 25544442089. The reversal of 25544442073 is 37024444552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17781422409 + 7763019664 = 133347^2 + 88108^2 .

It is a cyclic number.

It is not a de Polignac number, because 25544442073 - 2²¹ = 25542344921 is a prime.

It is not a weakly prime, because it can be changed into another prime (25544442373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12772221036 + 12772221037.

It is an arithmetic number, because the mean of its divisors is an integer number (12772221037).

Almost surely, 2^25544442073 is an apocalyptic number.

It is an amenable number.

25544442073 is a deficient number, since it is larger than the sum of its proper divisors (1).

25544442073 is an equidigital number, since it uses as much as digits as its factorization.

25544442073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 537600, while the sum is 40.

The spelling of 25544442073 in words is "twenty-five billion, five hundred forty-four million, four hundred forty-two thousand, seventy-three".