25550041813 has 2 divisors, whose sum is σ = 25550041814. Its totient is φ = 25550041812.

The previous prime is 25550041801. The next prime is 25550041823. The reversal of 25550041813 is 31814005552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20554096689 + 4995945124 = 143367^2 + 70682^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25550041813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25550041823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12775020906 + 12775020907.

It is an arithmetic number, because the mean of its divisors is an integer number (12775020907).

Almost surely, 2^25550041813 is an apocalyptic number.

It is an amenable number.

25550041813 is a deficient number, since it is larger than the sum of its proper divisors (1).

25550041813 is an equidigital number, since it uses as much as digits as its factorization.

25550041813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24000, while the sum is 34.

The spelling of 25550041813 in words is "twenty-five billion, five hundred fifty million, forty-one thousand, eight hundred thirteen".