1678795564 has 12 divisors (see below), whose sum is σ = 2993324544. Its totient is φ = 823559984.

The previous prime is 1678795549. The next prime is 1678795567. The reversal of 1678795564 is 4655978761.

It is a junction number, because it is equal to n+sod(n) for n = 1678795499 and 1678795508.

It is not an unprimeable number, because it can be changed into a prime (1678795567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3959212 + ... + 3959635.

It is an arithmetic number, because the mean of its divisors is an integer number (249443712).

Almost surely, 2^1678795564 is an apocalyptic number.

It is an amenable number.

1678795564 is a deficient number, since it is larger than the sum of its proper divisors (1314528980).

1678795564 is a wasteful number, since it uses less digits than its factorization.

1678795564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7918904 (or 7918902 counting only the distinct ones).

The product of its digits is 12700800, while the sum is 58.

The square root of 1678795564 is about 40973.1078147606. The cubic root of 1678795564 is about 1188.5002324135.

The spelling of 1678795564 in words is "one billion, six hundred seventy-eight million, seven hundred ninety-five thousand, five hundred sixty-four".