63808934891 has 8 divisors (see below), whose sum is σ = 71705024160. Its totient is φ = 56339661312.

The previous prime is 63808934881. The next prime is 63808934897. The reversal of 63808934891 is 19843980836.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63808934891 - 2¹⁴ = 63808918507 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 63808934891.

It is not an unprimeable number, because it can be changed into a prime (63808934897) 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 in 7 ways as a sum of consecutive naturals, for example, 106703606 + ... + 106704203.

It is an arithmetic number, because the mean of its divisors is an integer number (8963128020).

Almost surely, 2^63808934891 is an apocalyptic number.

63808934891 is a deficient number, since it is larger than the sum of its proper divisors (7896089269).

63808934891 is a wasteful number, since it uses less digits than its factorization.

63808934891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213407845.

The product of its (nonzero) digits is 8957952, while the sum is 59.

The spelling of 63808934891 in words is "sixty-three billion, eight hundred eight million, nine hundred thirty-four thousand, eight hundred ninety-one".