25455710381 has 2 divisors, whose sum is σ = 25455710382. Its totient is φ = 25455710380.

The previous prime is 25455710369. The next prime is 25455710383. The reversal of 25455710381 is 18301755452.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18841954756 + 6613755625 = 137266^2 + 81325^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25455710381 is a prime.

It is a super-2 number, since 2×25455710381² (a number of 22 digits) contains 22 as substring.

Together with 25455710383, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25455710383) 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, 12727855190 + 12727855191.

It is an arithmetic number, because the mean of its divisors is an integer number (12727855191).

Almost surely, 2^25455710381 is an apocalyptic number.

It is an amenable number.

25455710381 is a deficient number, since it is larger than the sum of its proper divisors (1).

25455710381 is an equidigital number, since it uses as much as digits as its factorization.

25455710381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168000, while the sum is 41.

The spelling of 25455710381 in words is "twenty-five billion, four hundred fifty-five million, seven hundred ten thousand, three hundred eighty-one".