1678945716 has 72 divisors (see below), whose sum is σ = 5105580480. Its totient is φ = 454450176.

The previous prime is 1678945679. The next prime is 1678945717. The reversal of 1678945716 is 6175498761.

1678945716 is a `hidden beast` number, since 1 + 67 + 8 + 9 + 4 + 571 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1678945717) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 170541 + ... + 180116.

It is an arithmetic number, because the mean of its divisors is an integer number (70910840).

Almost surely, 2^1678945716 is an apocalyptic number.

It is an amenable number.

1678945716 is an abundant number, since it is smaller than the sum of its proper divisors (3426634764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1678945716 is a wasteful number, since it uses less digits than its factorization.

1678945716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350693 (or 350688 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 1678945716 is about 40974.9400975767. The cubic root of 1678945716 is about 1188.5356646346.

The spelling of 1678945716 in words is "one billion, six hundred seventy-eight million, nine hundred forty-five thousand, seven hundred sixteen".