1678936964644 has 27 divisors (see below), whose sum is σ = 3036121041051. Its totient is φ = 812349981720.

The previous prime is 1678936964629. The next prime is 1678936964681. The reversal of 1678936964644 is 4464696398761.

The square root of 1678936964644 is 1295738.

It is a perfect power (a square), and thus also a powerful number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 80325307 + ... + 80346205.

Almost surely, 2^{1678936964644} is an apocalyptic number.

1678936964644 is the 1295738-th square number.

It is an amenable number.

1678936964644 is a deficient number, since it is larger than the sum of its proper divisors (1357184076407).

1678936964644 is an frugal number, since it uses more digits than its factorization.

1678936964644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41864 (or 20932 counting only the distinct ones).

The product of its digits is 1128701952, while the sum is 73.

The spelling of 1678936964644 in words is "one trillion, six hundred seventy-eight billion, nine hundred thirty-six million, nine hundred sixty-four thousand, six hundred forty-four".