25165261013 has 2 divisors, whose sum is σ = 25165261014. Its totient is φ = 25165261012.

The previous prime is 25165260959. The next prime is 25165261061. The reversal of 25165261013 is 31016256152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21194118724 + 3971142289 = 145582^2 + 63017^2 .

It is a cyclic number.

It is not a de Polignac number, because 25165261013 - 2²² = 25161066709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25165261073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12582630506 + 12582630507.

It is an arithmetic number, because the mean of its divisors is an integer number (12582630507).

Almost surely, 2^25165261013 is an apocalyptic number.

It is an amenable number.

25165261013 is a deficient number, since it is larger than the sum of its proper divisors (1).

25165261013 is an equidigital number, since it uses as much as digits as its factorization.

25165261013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 32.

The spelling of 25165261013 in words is "twenty-five billion, one hundred sixty-five million, two hundred sixty-one thousand, thirteen".