447850017561 has 4 divisors (see below), whose sum is σ = 597133356752. Its totient is φ = 298566678372.

The previous prime is 447850017523. The next prime is 447850017673. The reversal of 447850017561 is 165710058744.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 447850017561 - 2⁶ = 447850017497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 447850017561.

It is not an unprimeable number, because it can be changed into a prime (447850010561) 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 3 ways as a sum of consecutive naturals, for example, 74641669591 + ... + 74641669596.

It is an arithmetic number, because the mean of its divisors is an integer number (149283339188).

Almost surely, 2^447850017561 is an apocalyptic number.

It is an amenable number.

447850017561 is a deficient number, since it is larger than the sum of its proper divisors (149283339191).

447850017561 is a wasteful number, since it uses less digits than its factorization.

447850017561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149283339190.

The product of its (nonzero) digits is 940800, while the sum is 48.

The spelling of 447850017561 in words is "four hundred forty-seven billion, eight hundred fifty million, seventeen thousand, five hundred sixty-one".