25570833121 has 2 divisors, whose sum is σ = 25570833122. Its totient is φ = 25570833120.

The previous prime is 25570833107. The next prime is 25570833133. The reversal of 25570833121 is 12133807552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25276230225 + 294602896 = 158985^2 + 17164^2 .

It is a cyclic number.

It is not a de Polignac number, because 25570833121 - 2⁷ = 25570832993 is a prime.

It is not a weakly prime, because it can be changed into another prime (25570833181) 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, 12785416560 + 12785416561.

It is an arithmetic number, because the mean of its divisors is an integer number (12785416561).

Almost surely, 2^25570833121 is an apocalyptic number.

It is an amenable number.

25570833121 is a deficient number, since it is larger than the sum of its proper divisors (1).

25570833121 is an equidigital number, since it uses as much as digits as its factorization.

25570833121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 25570833121 in words is "twenty-five billion, five hundred seventy million, eight hundred thirty-three thousand, one hundred twenty-one".