1678954681 has 8 divisors (see below), whose sum is σ = 1766289600. Its totient is φ = 1593582480.

The previous prime is 1678954649. The next prime is 1678954721. The reversal of 1678954681 is 1864598761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1678954681 - 2⁵ = 1678954649 is a prime.

It is a super-2 number, since 2×1678954681² = 5637777641703623522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1678954601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 488925 + ... + 492346.

It is an arithmetic number, because the mean of its divisors is an integer number (220786200).

Almost surely, 2^1678954681 is an apocalyptic number.

It is an amenable number.

1678954681 is a deficient number, since it is larger than the sum of its proper divisors (87334919).

1678954681 is an equidigital number, since it uses as much as digits as its factorization.

1678954681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981359.

The product of its digits is 2903040, while the sum is 55.

The square root of 1678954681 is about 40975.0494935638. The cubic root of 1678954681 is about 1188.5377800898.

The spelling of 1678954681 in words is "one billion, six hundred seventy-eight million, nine hundred fifty-four thousand, six hundred eighty-one".