25570807523 has 2 divisors, whose sum is σ = 25570807524. Its totient is φ = 25570807522.

The previous prime is 25570807511. The next prime is 25570807531. The reversal of 25570807523 is 32570807552.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25570807523 is a prime.

It is a super-3 number, since 3×25570807523³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (25570807573) 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, 12785403761 + 12785403762.

It is an arithmetic number, because the mean of its divisors is an integer number (12785403762).

Almost surely, 2^25570807523 is an apocalyptic number.

25570807523 is a deficient number, since it is larger than the sum of its proper divisors (1).

25570807523 is an equidigital number, since it uses as much as digits as its factorization.

25570807523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 588000, while the sum is 44.

The spelling of 25570807523 in words is "twenty-five billion, five hundred seventy million, eight hundred seven thousand, five hundred twenty-three".