447376726981 has 8 divisors (see below), whose sum is σ = 465909579000. Its totient is φ = 429050946240.

The previous prime is 447376726963. The next prime is 447376726991. The reversal of 447376726981 is 189627673744.

It can be written as a sum of positive squares in 4 ways, for example, as 89186446881 + 358190280100 = 298641^2 + 598490^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 447376726981 - 2⁵ = 447376726949 is a prime.

It is a super-2 number, since 2×447376726981² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (447376726961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51763410 + ... + 51772051.

It is an arithmetic number, because the mean of its divisors is an integer number (58238697375).

Almost surely, 2^447376726981 is an apocalyptic number.

It is an amenable number.

447376726981 is a deficient number, since it is larger than the sum of its proper divisors (18532852019).

447376726981 is a wasteful number, since it uses less digits than its factorization.

447376726981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103535639.

The product of its digits is 85349376, while the sum is 64.

The spelling of 447376726981 in words is "four hundred forty-seven billion, three hundred seventy-six million, seven hundred twenty-six thousand, nine hundred eighty-one".