1681811504 has 30 divisors (see below), whose sum is σ = 3367044540. Its totient is φ = 813772320.

The previous prime is 1681811491. The next prime is 1681811507. The reversal of 1681811504 is 4051181861.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1681811507) 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 5 ways as a sum of consecutive naturals, for example, 39314 + ... + 70065.

It is an arithmetic number, because the mean of its divisors is an integer number (112234818).

Almost surely, 2^1681811504 is an apocalyptic number.

It is an amenable number.

1681811504 is an abundant number, since it is smaller than the sum of its proper divisors (1685233036).

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

1681811504 is a wasteful number, since it uses less digits than its factorization.

1681811504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109449 (or 109412 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 35.

The square root of 1681811504 is about 41009.8951961597. The cubic root of 1681811504 is about 1189.2115163708.

The spelling of 1681811504 in words is "one billion, six hundred eighty-one million, eight hundred eleven thousand, five hundred four".