34253643581 has 2 divisors, whose sum is σ = 34253643582. Its totient is φ = 34253643580.

The previous prime is 34253643577. The next prime is 34253643617. The reversal of 34253643581 is 18534635243.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24351602500 + 9902041081 = 156050^2 + 99509^2 .

It is an emirp because it is prime and its reverse (18534635243) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 34253643581 - 2² = 34253643577 is a prime.

It is a super-2 number, since 2×34253643581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34253643521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17126821790 + 17126821791.

It is an arithmetic number, because the mean of its divisors is an integer number (17126821791).

Almost surely, 2^34253643581 is an apocalyptic number.

It is an amenable number.

34253643581 is a deficient number, since it is larger than the sum of its proper divisors (1).

34253643581 is an equidigital number, since it uses as much as digits as its factorization.

34253643581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1036800, while the sum is 44.

The spelling of 34253643581 in words is "thirty-four billion, two hundred fifty-three million, six hundred forty-three thousand, five hundred eighty-one".