761163767809 has 9 divisors (see below), whose sum is σ = 763536329283. Its totient is φ = 758798563992.

The previous prime is 761163767759. The next prime is 761163767867. The reversal of 761163767809 is 908767361167.

The square root of 761163767809 is 872447.

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., 413738400625 + 347425367184 = 643225^2 + 589428^2 .

It is not a de Polignac number, because 761163767809 - 2¹⁹ = 761163243521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (761163762809) 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, 325421562 + ... + 325423900.

Almost surely, 2^761163767809 is an apocalyptic number.

761163767809 is the 872447-th square number.

761163767809 is the 436224-th centered octagonal number.

It is an amenable number.

761163767809 is a deficient number, since it is larger than the sum of its proper divisors (2372561474).

761163767809 is an frugal number, since it uses more digits than its factorization.

761163767809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5424 (or 2712 counting only the distinct ones).

The product of its (nonzero) digits is 16003008, while the sum is 61.

The spelling of 761163767809 in words is "seven hundred sixty-one billion, one hundred sixty-three million, seven hundred sixty-seven thousand, eight hundred nine".