71521080325441 has 4 divisors (see below), whose sum is σ = 71521271115712. Its totient is φ = 71520889535172.

The previous prime is 71521080325427. The next prime is 71521080325447. The reversal of 71521080325441 is 14452308012517.

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 a cyclic number.

It is not a de Polignac number, because 71521080325441 - 2⁹ = 71521080324929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71521080325447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94831725 + ... + 95582938.

It is an arithmetic number, because the mean of its divisors is an integer number (17880317778928).

Almost surely, 2^{71521080325441} is an apocalyptic number.

It is an amenable number.

71521080325441 is a deficient number, since it is larger than the sum of its proper divisors (190790271).

71521080325441 is a wasteful number, since it uses less digits than its factorization.

71521080325441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190790270.

The product of its (nonzero) digits is 268800, while the sum is 43.

Adding to 71521080325441 its reverse (14452308012517), we get a palindrome (85973388337958).

The spelling of 71521080325441 in words is "seventy-one trillion, five hundred twenty-one billion, eighty million, three hundred twenty-five thousand, four hundred forty-one".