681671468 has 12 divisors (see below), whose sum is σ = 1196467272. Its totient is φ = 339823680.

The previous prime is 681671449. The next prime is 681671509. The reversal of 681671468 is 864176186.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251498 + ... + 254193.

It is an arithmetic number, because the mean of its divisors is an integer number (99705606).

Almost surely, 2^681671468 is an apocalyptic number.

It is an amenable number.

681671468 is a deficient number, since it is larger than the sum of its proper divisors (514795804).

681671468 is a wasteful number, since it uses less digits than its factorization.

681671468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506032 (or 506030 counting only the distinct ones).

The product of its digits is 387072, while the sum is 47.

The square root of 681671468 is about 26108.8388864767. The cubic root of 681671468 is about 880.0858507841.

The spelling of 681671468 in words is "six hundred eighty-one million, six hundred seventy-one thousand, four hundred sixty-eight".