678445290851327 has 4 divisors (see below), whose sum is σ = 678518296917960. Its totient is φ = 678372284784696.

The previous prime is 678445290851323. The next prime is 678445290851371. The reversal of 678445290851327 is 723158092544876.

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 678445290851327 - 2² = 678445290851323 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 (678445290851323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36503019377 + ... + 36503037962.

It is an arithmetic number, because the mean of its divisors is an integer number (169629574229490).

It is a 2-persistent number, because it is pandigital, and so is 2⋅678445290851327 = 1356890581702654, but 3⋅678445290851327 = 2035335872553981 is not.

Almost surely, 2^{678445290851327} is an apocalyptic number.

678445290851327 is a deficient number, since it is larger than the sum of its proper divisors (73006066633).

678445290851327 is an equidigital number, since it uses as much as digits as its factorization.

678445290851327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73006066632.

The product of its (nonzero) digits is 812851200, while the sum is 71.

The spelling of 678445290851327 in words is "six hundred seventy-eight trillion, four hundred forty-five billion, two hundred ninety million, eight hundred fifty-one thousand, three hundred twenty-seven".