34647809891 has 4 divisors (see below), whose sum is σ = 36154236432. Its totient is φ = 33141383352.

The previous prime is 34647809881. The next prime is 34647809921. The reversal of 34647809891 is 19890874643.

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

It is a cyclic number.

It is not a de Polignac number, because 34647809891 - 2¹⁴ = 34647793507 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 34647809891.

It is not an unprimeable number, because it can be changed into a prime (34647809851) 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 in 3 ways as a sum of consecutive naturals, for example, 753213236 + ... + 753213281.

It is an arithmetic number, because the mean of its divisors is an integer number (9038559108).

Almost surely, 2^34647809891 is an apocalyptic number.

34647809891 is a deficient number, since it is larger than the sum of its proper divisors (1506426541).

34647809891 is a wasteful number, since it uses less digits than its factorization.

34647809891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506426540.

The product of its (nonzero) digits is 10450944, while the sum is 59.

The spelling of 34647809891 in words is "thirty-four billion, six hundred forty-seven million, eight hundred nine thousand, eight hundred ninety-one".