747268615809 has 27 divisors (see below), whose sum is σ = 1085736880137. Its totient is φ = 495265890816.

The previous prime is 747268615799. The next prime is 747268615859. The reversal of 747268615809 is 908516862747.

The square root of 747268615809 is 864447.

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

747268615809 is a `hidden beast` number, since 7 + 4 + 7 + 2 + 6 + 8 + 615 + 8 + 0 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 16756525809 + 730512090000 = 129447^2 + 854700^2 .

It is not a de Polignac number, because 747268615809 - 2¹¹ = 747268613761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (747268615859) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 500514067 + ... + 500515559.

Almost surely, 2^747268615809 is an apocalyptic number.

747268615809 is the 864447-th square number.

747268615809 is the 432224-th centered octagonal number.

It is an amenable number.

747268615809 is a deficient number, since it is larger than the sum of its proper divisors (338468264328).

747268615809 is an frugal number, since it uses more digits than its factorization.

747268615809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3378 (or 1689 counting only the distinct ones).

The product of its (nonzero) digits is 40642560, while the sum is 63.

The spelling of 747268615809 in words is "seven hundred forty-seven billion, two hundred sixty-eight million, six hundred fifteen thousand, eight hundred nine".