68809783881 has 8 divisors (see below), whose sum is σ = 91751035264. Its totient is φ = 45870860880.

The previous prime is 68809783879. The next prime is 68809783891. The reversal of 68809783881 is 18838790886.

It is a happy number.

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

It is not a de Polignac number, because 68809783881 - 2¹ = 68809783879 is a prime.

It is a super-2 number, since 2×68809783881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68809783891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 511930 + ... + 632211.

It is an arithmetic number, because the mean of its divisors is an integer number (11468879408).

Almost surely, 2^68809783881 is an apocalyptic number.

It is an amenable number.

68809783881 is a deficient number, since it is larger than the sum of its proper divisors (22941251383).

68809783881 is a wasteful number, since it uses less digits than its factorization.

68809783881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1164191.

The product of its (nonzero) digits is 37158912, while the sum is 66.

The spelling of 68809783881 in words is "sixty-eight billion, eight hundred nine million, seven hundred eighty-three thousand, eight hundred eighty-one".