681044080 has 40 divisors (see below), whose sum is σ = 1610276400. Its totient is φ = 267798528.

The previous prime is 681044047. The next prime is 681044093. The reversal of 681044080 is 80440186.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67425 + ... + 76864.

It is an arithmetic number, because the mean of its divisors is an integer number (40256910).

Almost surely, 2^681044080 is an apocalyptic number.

It is an amenable number.

681044080 is an abundant number, since it is smaller than the sum of its proper divisors (929232320).

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

681044080 is a wasteful number, since it uses less digits than its factorization.

681044080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144361 (or 144355 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 681044080 is about 26096.8212623683. The cubic root of 681044080 is about 879.8157672177.

The spelling of 681044080 in words is "six hundred eighty-one million, forty-four thousand, eighty".