681742182 has 32 divisors (see below), whose sum is σ = 1507824000. Its totient is φ = 203757120.

The previous prime is 681742169. The next prime is 681742183. The reversal of 681742182 is 281247186.

It is a happy number.

It is a super-2 number, since 2×681742182² = 929544805436242248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 681742182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681742183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65932 + ... + 75567.

It is an arithmetic number, because the mean of its divisors is an integer number (47119500).

Almost surely, 2^681742182 is an apocalyptic number.

681742182 is an abundant number, since it is smaller than the sum of its proper divisors (826081818).

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

681742182 is a wasteful number, since it uses less digits than its factorization.

681742182 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141588.

The product of its digits is 43008, while the sum is 39.

The square root of 681742182 is about 26110.1930670763. The cubic root of 681742182 is about 880.1162819825.

The spelling of 681742182 in words is "six hundred eighty-one million, seven hundred forty-two thousand, one hundred eighty-two".