284397945681 has 16 divisors (see below), whose sum is σ = 384318259200. Its totient is φ = 187054813008.

The previous prime is 284397945673. The next prime is 284397945683. The reversal of 284397945681 is 186549793482.

It is a happy number.

It is not a de Polignac number, because 284397945681 - 2³ = 284397945673 is a prime.

It is a super-2 number, since 2×284397945681² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (284397945683) 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, 2016861 + ... + 2153258.

It is an arithmetic number, because the mean of its divisors is an integer number (24019891200).

Almost surely, 2^284397945681 is an apocalyptic number.

It is an amenable number.

284397945681 is a deficient number, since it is larger than the sum of its proper divisors (99920313519).

284397945681 is a wasteful number, since it uses less digits than its factorization.

284397945681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4170428.

The product of its digits is 104509440, while the sum is 66.

The spelling of 284397945681 in words is "two hundred eighty-four billion, three hundred ninety-seven million, nine hundred forty-five thousand, six hundred eighty-one".