34102705781 has 4 divisors (see below), whose sum is σ = 34109105772. Its totient is φ = 34096305792.

The previous prime is 34102705771. The next prime is 34102705799. The reversal of 34102705781 is 18750720143.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18815608900 + 15287096881 = 137170^2 + 123641^2 .

It is a cyclic number.

It is not a de Polignac number, because 34102705781 - 2³⁴ = 16922836597 is a prime.

It is a super-2 number, since 2×34102705781² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34102705771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3191996 + ... + 3202661.

It is an arithmetic number, because the mean of its divisors is an integer number (8527276443).

Almost surely, 2^34102705781 is an apocalyptic number.

It is an amenable number.

34102705781 is a deficient number, since it is larger than the sum of its proper divisors (6399991).

34102705781 is an equidigital number, since it uses as much as digits as its factorization.

34102705781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6399990.

The product of its (nonzero) digits is 47040, while the sum is 38.

The spelling of 34102705781 in words is "thirty-four billion, one hundred two million, seven hundred five thousand, seven hundred eighty-one".