34254456781 has 2 divisors, whose sum is σ = 34254456782. Its totient is φ = 34254456780.

The previous prime is 34254456779. The next prime is 34254456809. The reversal of 34254456781 is 18765445243.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20831148900 + 13423307881 = 144330^2 + 115859^2 .

It is an emirp because it is prime and its reverse (18765445243) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 34254456781 - 2¹ = 34254456779 is a prime.

It is a super-2 number, since 2×34254456781² (a number of 22 digits) contains 22 as substring.

Together with 34254456779, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34254456701) 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, 17127228390 + 17127228391.

It is an arithmetic number, because the mean of its divisors is an integer number (17127228391).

Almost surely, 2^34254456781 is an apocalyptic number.

It is an amenable number.

34254456781 is a deficient number, since it is larger than the sum of its proper divisors (1).

34254456781 is an equidigital number, since it uses as much as digits as its factorization.

34254456781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3225600, while the sum is 49.

The spelling of 34254456781 in words is "thirty-four billion, two hundred fifty-four million, four hundred fifty-six thousand, seven hundred eighty-one".