681127768 has 8 divisors (see below), whose sum is σ = 1277114580. Its totient is φ = 340563880.

The previous prime is 681127747. The next prime is 681127781. The reversal of 681127768 is 867721186.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42570478 + ... + 42570493.

Almost surely, 2^681127768 is an apocalyptic number.

It is an amenable number.

681127768 is a deficient number, since it is larger than the sum of its proper divisors (595986812).

681127768 is a wasteful number, since it uses less digits than its factorization.

681127768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85140977 (or 85140973 counting only the distinct ones).

The product of its digits is 225792, while the sum is 46.

The square root of 681127768 is about 26098.4246267854. The cubic root of 681127768 is about 879.8518035568.

The spelling of 681127768 in words is "six hundred eighty-one million, one hundred twenty-seven thousand, seven hundred sixty-eight".