673613800078 has 4 divisors (see below), whose sum is σ = 1010420700120. Its totient is φ = 336806900038.

The previous prime is 673613800061. The next prime is 673613800091. The reversal of 673613800078 is 870008316376.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 168403450018 + ... + 168403450021.

It is an arithmetic number, because the mean of its divisors is an integer number (252605175030).

Almost surely, 2^673613800078 is an apocalyptic number.

673613800078 is a deficient number, since it is larger than the sum of its proper divisors (336806900042).

673613800078 is a wasteful number, since it uses less digits than its factorization.

673613800078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336806900041.

The product of its (nonzero) digits is 1016064, while the sum is 49.

The spelling of 673613800078 in words is "six hundred seventy-three billion, six hundred thirteen million, eight hundred thousand, seventy-eight".