71521411337 has 4 divisors (see below), whose sum is σ = 71785328256. Its totient is φ = 71257494420.

The previous prime is 71521411321. The next prime is 71521411397. The reversal of 71521411337 is 73311412517.

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 71521411337 - 2⁴ = 71521411321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71521411297 and 71521411306.

It is not an unprimeable number, because it can be changed into a prime (71521411397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131958053 + ... + 131958594.

It is an arithmetic number, because the mean of its divisors is an integer number (17946332064).

Almost surely, 2^71521411337 is an apocalyptic number.

It is an amenable number.

71521411337 is a deficient number, since it is larger than the sum of its proper divisors (263916919).

71521411337 is a wasteful number, since it uses less digits than its factorization.

71521411337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263916918.

The product of its digits is 17640, while the sum is 35.

The spelling of 71521411337 in words is "seventy-one billion, five hundred twenty-one million, four hundred eleven thousand, three hundred thirty-seven".