681892146 has 48 divisors (see below), whose sum is σ = 1618081920. Its totient is φ = 206252640.

The previous prime is 681892111. The next prime is 681892153. The reversal of 681892146 is 641298186.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10890 + ... + 38501.

It is an arithmetic number, because the mean of its divisors is an integer number (33710040).

Almost surely, 2^681892146 is an apocalyptic number.

681892146 is an abundant number, since it is smaller than the sum of its proper divisors (936189774).

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

681892146 is a wasteful number, since it uses less digits than its factorization.

681892146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49471 (or 49468 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 681892146 is about 26113.0646611998. The cubic root of 681892146 is about 880.1808108151.

The spelling of 681892146 in words is "six hundred eighty-one million, eight hundred ninety-two thousand, one hundred forty-six".