1681656284 has 48 divisors (see below), whose sum is σ = 3743980800. Its totient is φ = 655184880.

The previous prime is 1681656283. The next prime is 1681656289. The reversal of 1681656284 is 4826561861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681656283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40622 + ... + 70805.

It is an arithmetic number, because the mean of its divisors is an integer number (77999600).

Almost surely, 2^1681656284 is an apocalyptic number.

1681656284 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1681656284 is an abundant number, since it is smaller than the sum of its proper divisors (2062324516).

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

1681656284 is a wasteful number, since it uses less digits than its factorization.

1681656284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111463 (or 111447 counting only the distinct ones).

The product of its digits is 552960, while the sum is 47.

The square root of 1681656284 is about 41008.0026824033. The cubic root of 1681656284 is about 1189.1749298112.

The spelling of 1681656284 in words is "one billion, six hundred eighty-one million, six hundred fifty-six thousand, two hundred eighty-four".