681746954 has 24 divisors (see below), whose sum is σ = 1241508000. Its totient is φ = 274988736.

The previous prime is 681746929. The next prime is 681746957. The reversal of 681746954 is 459647186.

It is not an unprimeable number, because it can be changed into a prime (681746957) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80204 + ... + 88295.

It is an arithmetic number, because the mean of its divisors is an integer number (51729500).

Almost surely, 2^681746954 is an apocalyptic number.

681746954 is a deficient number, since it is larger than the sum of its proper divisors (559761046).

681746954 is a wasteful number, since it uses less digits than its factorization.

681746954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168542 (or 168525 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 50.

The square root of 681746954 is about 26110.2844488527. The cubic root of 681746954 is about 880.1183354983.

The spelling of 681746954 in words is "six hundred eighty-one million, seven hundred forty-six thousand, nine hundred fifty-four".