1681459884 has 72 divisors (see below), whose sum is σ = 4746873040. Its totient is φ = 517368384.

The previous prime is 1681459877. The next prime is 1681459889. The reversal of 1681459884 is 4889541861.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 1681459884.

It is not an unprimeable number, because it can be changed into a prime (1681459889) by changing a digit.

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, 53899 + ... + 79170.

Almost surely, 2^1681459884 is an apocalyptic number.

It is an amenable number.

1681459884 is an abundant number, since it is smaller than the sum of its proper divisors (3065413156).

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

1681459884 is a wasteful number, since it uses less digits than its factorization.

1681459884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133101 (or 133087 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 54.

The square root of 1681459884 is about 41005.6079579367. The cubic root of 1681459884 is about 1189.1286335791.

The spelling of 1681459884 in words is "one billion, six hundred eighty-one million, four hundred fifty-nine thousand, eight hundred eighty-four".