25485484846181 has 2 divisors, whose sum is σ = 25485484846182. Its totient is φ = 25485484846180.

The previous prime is 25485484846147. The next prime is 25485484846187. The reversal of 25485484846181 is 18164848458452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18547707957025 + 6937776889156 = 4306705^2 + 2633966^2 .

It is a cyclic number.

It is not a de Polignac number, because 25485484846181 - 2³⁴ = 25468304976997 is a prime.

It is a super-2 number, since 2×25485484846181² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25485484846187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12742742423090 + 12742742423091.

It is an arithmetic number, because the mean of its divisors is an integer number (12742742423091).

Almost surely, 2^{25485484846181} is an apocalyptic number.

It is an amenable number.

25485484846181 is a deficient number, since it is larger than the sum of its proper divisors (1).

25485484846181 is an equidigital number, since it uses as much as digits as its factorization.

25485484846181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 314572800, while the sum is 68.

The spelling of 25485484846181 in words is "twenty-five trillion, four hundred eighty-five billion, four hundred eighty-four million, eight hundred forty-six thousand, one hundred eighty-one".