71496877321 has 3 divisors (see below), whose sum is σ = 71497144711. Its totient is φ = 71496609932.

The previous prime is 71496877303. The next prime is 71496877399. The reversal of 71496877321 is 12377869417.

The square root of 71496877321 is 267389.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 71389961721 + 106915600 = 267189^2 + 10340^2 .

It is not a de Polignac number, because 71496877321 - 2⁹ = 71496876809 is a prime.

It is a super-2 number, since 2×71496877321² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71496877301) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 133695 + ... + 401083.

Almost surely, 2^71496877321 is an apocalyptic number.

71496877321 is the 267389-th square number.

71496877321 is the 133695-th centered octagonal number.

It is an amenable number.

71496877321 is a deficient number, since it is larger than the sum of its proper divisors (267390).

71496877321 is an frugal number, since it uses more digits than its factorization.

71496877321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534778 (or 267389 counting only the distinct ones).

The product of its digits is 3556224, while the sum is 55.

The spelling of 71496877321 in words is "seventy-one billion, four hundred ninety-six million, eight hundred seventy-seven thousand, three hundred twenty-one".