71346149449 has 9 divisors (see below), whose sum is σ = 72356657223. Its totient is φ = 70349573232.

The previous prime is 71346149393. The next prime is 71346149471. The reversal of 71346149449 is 94494164317.

The square root of 71346149449 is 267107.

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

It can be written as a sum of positive squares in only one way, i.e., 40499550025 + 30846599424 = 201245^2 + 175632^2 .

It is not a de Polignac number, because 71346149449 - 2¹⁹ = 71345625161 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71346149396 and 71346149405.

It is not an unprimeable number, because it can be changed into a prime (71346149249) 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 8 ways as a sum of consecutive naturals, for example, 19496982 + ... + 19500640.

Almost surely, 2^71346149449 is an apocalyptic number.

71346149449 is the 267107-th square number.

71346149449 is the 133554-th centered octagonal number.

It is an amenable number.

71346149449 is a deficient number, since it is larger than the sum of its proper divisors (1010507774).

71346149449 is an frugal number, since it uses more digits than its factorization.

71346149449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7464 (or 3732 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 52.

The spelling of 71346149449 in words is "seventy-one billion, three hundred forty-six million, one hundred forty-nine thousand, four hundred forty-nine".