25250146681 has 2 divisors, whose sum is σ = 25250146682. Its totient is φ = 25250146680.

The previous prime is 25250146679. The next prime is 25250146693. The reversal of 25250146681 is 18664105252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23526651456 + 1723495225 = 153384^2 + 41515^2 .

It is a cyclic number.

It is not a de Polignac number, because 25250146681 - 2¹ = 25250146679 is a prime.

It is a super-2 number, since 2×25250146681² (a number of 22 digits) contains 22 as substring.

Together with 25250146679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25250116681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12625073340 + 12625073341.

It is an arithmetic number, because the mean of its divisors is an integer number (12625073341).

Almost surely, 2^25250146681 is an apocalyptic number.

It is an amenable number.

25250146681 is a deficient number, since it is larger than the sum of its proper divisors (1).

25250146681 is an equidigital number, since it uses as much as digits as its factorization.

25250146681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 115200, while the sum is 40.

The spelling of 25250146681 in words is "twenty-five billion, two hundred fifty million, one hundred forty-six thousand, six hundred eighty-one".