25106382881 has 2 divisors, whose sum is σ = 25106382882. Its totient is φ = 25106382880.

The previous prime is 25106382877. The next prime is 25106382979. The reversal of 25106382881 is 18828360152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19327950625 + 5778432256 = 139025^2 + 76016^2 .

It is a cyclic number.

It is not a de Polignac number, because 25106382881 - 2² = 25106382877 is a prime.

It is a super-2 number, since 2×25106382881² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25106382871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12553191440 + 12553191441.

It is an arithmetic number, because the mean of its divisors is an integer number (12553191441).

Almost surely, 2^25106382881 is an apocalyptic number.

It is an amenable number.

25106382881 is a deficient number, since it is larger than the sum of its proper divisors (1).

25106382881 is an equidigital number, since it uses as much as digits as its factorization.

25106382881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 184320, while the sum is 44.

The spelling of 25106382881 in words is "twenty-five billion, one hundred six million, three hundred eighty-two thousand, eight hundred eighty-one".