678304806742 has 4 divisors (see below), whose sum is σ = 1017457210116. Its totient is φ = 339152403370.

The previous prime is 678304806737. The next prime is 678304806743. The reversal of 678304806742 is 247608403876.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678304806743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169576201684 + ... + 169576201687.

It is an arithmetic number, because the mean of its divisors is an integer number (254364302529).

Almost surely, 2^678304806742 is an apocalyptic number.

678304806742 is a deficient number, since it is larger than the sum of its proper divisors (339152403374).

678304806742 is a wasteful number, since it uses less digits than its factorization.

678304806742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339152403373.

The product of its (nonzero) digits is 10838016, while the sum is 55.

The spelling of 678304806742 in words is "six hundred seventy-eight billion, three hundred four million, eight hundred six thousand, seven hundred forty-two".