68811919963 has 4 divisors (see below), whose sum is σ = 68871088728. Its totient is φ = 68752751200.

The previous prime is 68811919933. The next prime is 68811919973. The reversal of 68811919963 is 36991911886.

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 68811919963 - 2¹³ = 68811911771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68811919933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29582638 + ... + 29584963.

It is an arithmetic number, because the mean of its divisors is an integer number (17217772182).

Almost surely, 2^68811919963 is an apocalyptic number.

68811919963 is a deficient number, since it is larger than the sum of its proper divisors (59168765).

68811919963 is a wasteful number, since it uses less digits than its factorization.

68811919963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59168764.

The product of its digits is 5038848, while the sum is 61.

The spelling of 68811919963 in words is "sixty-eight billion, eight hundred eleven million, nine hundred nineteen thousand, nine hundred sixty-three".