1681696524 has 24 divisors (see below), whose sum is σ = 3924704560. Its totient is φ = 560458944.

The previous prime is 1681696507. The next prime is 1681696531. The reversal of 1681696524 is 4256961861.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76842 + ... + 96270.

Almost surely, 2^1681696524 is an apocalyptic number.

It is an amenable number.

1681696524 is an abundant number, since it is smaller than the sum of its proper divisors (2243008036).

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

1681696524 is a wasteful number, since it uses less digits than its factorization.

1681696524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26649 (or 26647 counting only the distinct ones).

The product of its digits is 622080, while the sum is 48.

The square root of 1681696524 is about 41008.4933154097. The cubic root of 1681696524 is about 1189.1844149079.

The spelling of 1681696524 in words is "one billion, six hundred eighty-one million, six hundred ninety-six thousand, five hundred twenty-four".