747932658561 has 81 divisors (see below), whose sum is σ = 1207341893667. Its totient is φ = 445837677120.

The previous prime is 747932658521. The next prime is 747932658569. The reversal of 747932658561 is 165856239747.

The square root of 747932658561 is 864831.

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

747932658561 is a `hidden beast` number, since 7 + 4 + 7 + 9 + 3 + 2 + 65 + 8 + 561 = 666.

It can be written as a sum of positive squares in only one way, i.e., 424563012225 + 323369646336 = 651585^2 + 568656^2 .

It is a de Polignac number, because none of the positive numbers 2^k-747932658561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (747932658569) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 2083377700 + ... + 2083378058.

Almost surely, 2^747932658561 is an apocalyptic number.

747932658561 is the 864831-st square number.

747932658561 is the 432416-th centered octagonal number.

It is an amenable number.

747932658561 is a deficient number, since it is larger than the sum of its proper divisors (459409235106).

747932658561 is an equidigital number, since it uses as much as digits as its factorization.

747932658561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892 (or 446 counting only the distinct ones).

The product of its digits is 76204800, while the sum is 63.

The spelling of 747932658561 in words is "seven hundred forty-seven billion, nine hundred thirty-two million, six hundred fifty-eight thousand, five hundred sixty-one".