68880875781 has 8 divisors (see below), whose sum is σ = 91845742464. Its totient is φ = 45918296480.

The previous prime is 68880875761. The next prime is 68880875783. The reversal of 68880875781 is 18757808886.

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 68880875781 - 2⁷ = 68880875653 is a prime.

It is a super-2 number, since 2×68880875781² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68880875783) 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 7 ways as a sum of consecutive naturals, for example, 500301 + ... + 622946.

It is an arithmetic number, because the mean of its divisors is an integer number (11480717808).

Almost surely, 2^68880875781 is an apocalyptic number.

It is an amenable number.

68880875781 is a deficient number, since it is larger than the sum of its proper divisors (22964866683).

68880875781 is a wasteful number, since it uses less digits than its factorization.

68880875781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1143691.

The product of its (nonzero) digits is 48168960, while the sum is 66.

The spelling of 68880875781 in words is "sixty-eight billion, eight hundred eighty million, eight hundred seventy-five thousand, seven hundred eighty-one".