9547129764649 has 9 divisors (see below), whose sum is σ = 9980344158519. Its totient is φ = 9131969189640.

The previous prime is 9547129764647. The next prime is 9547129764691. The reversal of 9547129764649 is 9464679217459.

The square root of 9547129764649 is 3089843.

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., 7153982644249 + 2393147120400 = 2674693^2 + 1546980^2 .

It is not a de Polignac number, because 9547129764649 - 2¹ = 9547129764647 is a prime.

It is a super-2 number, since 2×9547129764649² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9547129764647) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 70999219 + ... + 71133559.

Almost surely, 2^{9547129764649} is an apocalyptic number.

9547129764649 is the 3089843-rd square number.

9547129764649 is the 1544922-nd centered octagonal number.

It is an amenable number.

9547129764649 is a deficient number, since it is larger than the sum of its proper divisors (433214393870).

9547129764649 is an frugal number, since it uses more digits than its factorization.

9547129764649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268728 (or 134364 counting only the distinct ones).

The product of its digits is 823011840, while the sum is 73.

The spelling of 9547129764649 in words is "nine trillion, five hundred forty-seven billion, one hundred twenty-nine million, seven hundred sixty-four thousand, six hundred forty-nine".