1681521486 has 32 divisors (see below), whose sum is σ = 3428569248. Its totient is φ = 549642240.

The previous prime is 1681521469. The next prime is 1681521509. The reversal of 1681521486 is 6841251861.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116526 + ... + 130158.

It is an arithmetic number, because the mean of its divisors is an integer number (107142789).

Almost surely, 2^1681521486 is an apocalyptic number.

1681521486 is an abundant number, since it is smaller than the sum of its proper divisors (1747047762).

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

1681521486 is a wasteful number, since it uses less digits than its factorization.

1681521486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14036.

The product of its digits is 92160, while the sum is 42.

The square root of 1681521486 is about 41006.3590922189. The cubic root of 1681521486 is about 1189.1431550490.

The spelling of 1681521486 in words is "one billion, six hundred eighty-one million, five hundred twenty-one thousand, four hundred eighty-six".