681880572 has 24 divisors (see below), whose sum is σ = 1767838800. Its totient is φ = 227293488.

The previous prime is 681880571. The next prime is 681880597. The reversal of 681880572 is 275088186.

681880572 is a `hidden beast` number, since 68 + 18 + 8 + 0 + 572 = 666.

It is a super-2 number, since 2×681880572² = 929922228942094368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681880571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3156747 + ... + 3156962.

It is an arithmetic number, because the mean of its divisors is an integer number (73659950).

Almost surely, 2^681880572 is an apocalyptic number.

It is an amenable number.

681880572 is an abundant number, since it is smaller than the sum of its proper divisors (1085958228).

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

681880572 is a wasteful number, since it uses less digits than its factorization.

681880572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6313722 (or 6313714 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 45.

The square root of 681880572 is about 26112.8430470525. The cubic root of 681880572 is about 880.1758309121.

The spelling of 681880572 in words is "six hundred eighty-one million, eight hundred eighty thousand, five hundred seventy-two".