25570807573 has 2 divisors, whose sum is σ = 25570807574. Its totient is φ = 25570807572.

The previous prime is 25570807531. The next prime is 25570807597. The reversal of 25570807573 is 37570807552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25210453284 + 360354289 = 158778^2 + 18983^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25570807573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25570807523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12785403786 + 12785403787.

It is an arithmetic number, because the mean of its divisors is an integer number (12785403787).

Almost surely, 2^25570807573 is an apocalyptic number.

It is an amenable number.

25570807573 is a deficient number, since it is larger than the sum of its proper divisors (1).

25570807573 is an equidigital number, since it uses as much as digits as its factorization.

25570807573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2058000, while the sum is 49.

The spelling of 25570807573 in words is "twenty-five billion, five hundred seventy million, eight hundred seven thousand, five hundred seventy-three".