678807352079 has 4 divisors (see below), whose sum is σ = 714534054840. Its totient is φ = 643080649320.

The previous prime is 678807352073. The next prime is 678807352081. The reversal of 678807352079 is 970253708876.

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 678807352079 - 2³² = 674512384783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678807352073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17863351352 + ... + 17863351389.

It is an arithmetic number, because the mean of its divisors is an integer number (178633513710).

Almost surely, 2^678807352079 is an apocalyptic number.

678807352079 is a deficient number, since it is larger than the sum of its proper divisors (35726702761).

678807352079 is a wasteful number, since it uses less digits than its factorization.

678807352079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35726702760.

The product of its (nonzero) digits is 35562240, while the sum is 62.

The spelling of 678807352079 in words is "six hundred seventy-eight billion, eight hundred seven million, three hundred fifty-two thousand, seventy-nine".