4471971251969 has 4 divisors (see below), whose sum is σ = 4815969040596. Its totient is φ = 4127973463344.

The previous prime is 4471971251959. The next prime is 4471971251977. The reversal of 4471971251969 is 9691521791744.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3092192122369 + 1379779129600 = 1758463^2 + 1174640^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4471971251969 is a prime.

It is a super-2 number, since 2×4471971251969² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4471971251959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171998894294 + ... + 171998894319.

It is an arithmetic number, because the mean of its divisors is an integer number (1203992260149).

Almost surely, 2^{4471971251969} is an apocalyptic number.

It is an amenable number.

4471971251969 is a deficient number, since it is larger than the sum of its proper divisors (343997788627).

4471971251969 is a wasteful number, since it uses less digits than its factorization.

4471971251969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343997788626.

The product of its digits is 34292160, while the sum is 65.

The spelling of 4471971251969 in words is "four trillion, four hundred seventy-one billion, nine hundred seventy-one million, two hundred fifty-one thousand, nine hundred sixty-nine".