681016427 has 12 divisors (see below), whose sum is σ = 842780880. Its totient is φ = 538825248.

The previous prime is 681016423. The next prime is 681016429. The reversal of 681016427 is 724610186.

It is not a de Polignac number, because 681016427 - 2² = 681016423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681016423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 286652 + ... + 289017.

It is an arithmetic number, because the mean of its divisors is an integer number (70231740).

Almost surely, 2^681016427 is an apocalyptic number.

681016427 is a deficient number, since it is larger than the sum of its proper divisors (161764453).

681016427 is a wasteful number, since it uses less digits than its factorization.

681016427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575702 (or 575689 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 681016427 is about 26096.2914415056. The cubic root of 681016427 is about 879.8038590924.

The spelling of 681016427 in words is "six hundred eighty-one million, sixteen thousand, four hundred twenty-seven".