681178716 has 36 divisors (see below), whose sum is σ = 1723208032. Its totient is φ = 226882944.

The previous prime is 681178711. The next prime is 681178721. The reversal of 681178716 is 617871186.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (681178711) and next prime (681178721).

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681178711) 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, 44580 + ... + 57876.

Almost surely, 2^681178716 is an apocalyptic number.

It is an amenable number.

681178716 is an abundant number, since it is smaller than the sum of its proper divisors (1042029316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681178716 is a wasteful number, since it uses less digits than its factorization.

681178716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14730 (or 14725 counting only the distinct ones).

The product of its digits is 112896, while the sum is 45.

The square root of 681178716 is about 26099.4006827743. The cubic root of 681178716 is about 879.8737404944.

The spelling of 681178716 in words is "six hundred eighty-one million, one hundred seventy-eight thousand, seven hundred sixteen".