447972521241981 has 32 divisors (see below), whose sum is σ = 651428511638400. Its totient is φ = 272747637227520.

The previous prime is 447972521241913. The next prime is 447972521242009. The reversal of 447972521241981 is 189142125279744.

It is not a de Polignac number, because 447972521241981 - 2¹³ = 447972521233789 is a prime.

It is a super-2 number, since 2×447972521241981² (a number of 30 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (447972521245981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 210333376 + ... + 212452521.

It is an arithmetic number, because the mean of its divisors is an integer number (20357140988700).

Almost surely, 2^{447972521241981} is an apocalyptic number.

It is an amenable number.

447972521241981 is a deficient number, since it is larger than the sum of its proper divisors (203455990396419).

447972521241981 is a wasteful number, since it uses less digits than its factorization.

447972521241981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422786589.

The product of its digits is 81285120, while the sum is 66.

The spelling of 447972521241981 in words is "four hundred forty-seven trillion, nine hundred seventy-two billion, five hundred twenty-one million, two hundred forty-one thousand, nine hundred eighty-one".