681584130 has 96 divisors (see below), whose sum is σ = 1819584000. Its totient is φ = 176931456.

The previous prime is 681584069. The next prime is 681584149. The reversal of 681584130 is 31485186.

681584130 is a `hidden beast` number, since 68 + 1 + 584 + 13 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1137571 + ... + 1138169.

It is an arithmetic number, because the mean of its divisors is an integer number (18954000).

Almost surely, 2^681584130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 681584130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (909792000).

681584130 is an abundant number, since it is smaller than the sum of its proper divisors (1137999870).

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

681584130 is a wasteful number, since it uses less digits than its factorization.

681584130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928 (or 925 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 681584130 is about 26107.1662575623. The cubic root of 681584130 is about 880.0482626767.

The spelling of 681584130 in words is "six hundred eighty-one million, five hundred eighty-four thousand, one hundred thirty".