1678357678 has 16 divisors (see below), whose sum is σ = 2569637520. Its totient is φ = 821868736.

The previous prime is 1678357661. The next prime is 1678357757. The reversal of 1678357678 is 8767538761.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46401 + ... + 74227.

It is an arithmetic number, because the mean of its divisors is an integer number (160602345).

Almost surely, 2^1678357678 is an apocalyptic number.

1678357678 is a deficient number, since it is larger than the sum of its proper divisors (891279842).

1678357678 is a wasteful number, since it uses less digits than its factorization.

1678357678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28451.

The product of its digits is 11854080, while the sum is 58.

The square root of 1678357678 is about 40967.7638882085. The cubic root of 1678357678 is about 1188.3968898985.

The spelling of 1678357678 in words is "one billion, six hundred seventy-eight million, three hundred fifty-seven thousand, six hundred seventy-eight".