1681286809220 has 24 divisors (see below), whose sum is σ = 3530726674944. Its totient is φ = 672510080736.

The previous prime is 1681286809183. The next prime is 1681286809243. The reversal of 1681286809220 is 229086821861.

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, 5413469 + ... + 5715611.

It is an arithmetic number, because the mean of its divisors is an integer number (147113611456).

Almost surely, 2^{1681286809220} is an apocalyptic number.

1681286809220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1681286809220 is an abundant number, since it is smaller than the sum of its proper divisors (1849439865724).

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

1681286809220 is a wasteful number, since it uses less digits than its factorization.

1681286809220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580379 (or 580377 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 53.

The spelling of 1681286809220 in words is "one trillion, six hundred eighty-one billion, two hundred eighty-six million, eight hundred nine thousand, two hundred twenty".