678870873611 has 4 divisors (see below), whose sum is σ = 775852426992. Its totient is φ = 581889320232.

The previous prime is 678870873589. The next prime is 678870873623. The reversal of 678870873611 is 116378078876.

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 678870873611 - 2²² = 678866679307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678870873211) 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 3 ways as a sum of consecutive naturals, for example, 48490776680 + ... + 48490776693.

It is an arithmetic number, because the mean of its divisors is an integer number (193963106748).

Almost surely, 2^678870873611 is an apocalyptic number.

678870873611 is a deficient number, since it is larger than the sum of its proper divisors (96981553381).

678870873611 is an equidigital number, since it uses as much as digits as its factorization.

678870873611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96981553380.

The product of its (nonzero) digits is 18966528, while the sum is 62.

The spelling of 678870873611 in words is "six hundred seventy-eight billion, eight hundred seventy million, eight hundred seventy-three thousand, six hundred eleven".