283420839681 has 72 divisors (see below), whose sum is σ = 501516506400. Its totient is φ = 153361071360.

The previous prime is 283420839679. The next prime is 283420839701. The reversal of 283420839681 is 186938024382.

283420839681 is a `hidden beast` number, since 2 + 83 + 420 + 83 + 9 + 68 + 1 = 666.

It is not a de Polignac number, because 283420839681 - 2¹ = 283420839679 is a prime.

It is a super-2 number, since 2×283420839681² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (283420839671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 22273401 + ... + 22286121.

Almost surely, 2^283420839681 is an apocalyptic number.

283420839681 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

283420839681 is a deficient number, since it is larger than the sum of its proper divisors (218095666719).

283420839681 is a wasteful number, since it uses less digits than its factorization.

283420839681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15419 (or 15409 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 54.

The spelling of 283420839681 in words is "two hundred eighty-three billion, four hundred twenty million, eight hundred thirty-nine thousand, six hundred eighty-one".