25071379217 has 2 divisors, whose sum is σ = 25071379218. Its totient is φ = 25071379216.

The previous prime is 25071379199. The next prime is 25071379231. The reversal of 25071379217 is 71297317052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19201367761 + 5870011456 = 138569^2 + 76616^2 .

It is a cyclic number.

It is not a de Polignac number, because 25071379217 - 2¹⁶ = 25071313681 is a prime.

It is not a weakly prime, because it can be changed into another prime (25071376217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12535689608 + 12535689609.

It is an arithmetic number, because the mean of its divisors is an integer number (12535689609).

Almost surely, 2^25071379217 is an apocalyptic number.

It is an amenable number.

25071379217 is a deficient number, since it is larger than the sum of its proper divisors (1).

25071379217 is an equidigital number, since it uses as much as digits as its factorization.

25071379217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 185220, while the sum is 44.

The spelling of 25071379217 in words is "twenty-five billion, seventy-one million, three hundred seventy-nine thousand, two hundred seventeen".