73800785569 has 15 divisors (see below), whose sum is σ = 86287903077. Its totient is φ = 62936710536.

The previous prime is 73800785521. The next prime is 73800785579. The reversal of 73800785569 is 96558700837.

The square root of 73800785569 is 271663.

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

It can be written as a sum of positive squares in 2 ways, for example, as 67957711969 + 5843073600 = 260687^2 + 76440^2 .

It is not a de Polignac number, because 73800785569 - 2⁹ = 73800785057 is a prime.

It is a super-2 number, since 2×73800785569² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73800785579) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 374623179 + ... + 374623375.

Almost surely, 2^73800785569 is an apocalyptic number.

73800785569 is the 271663-rd square number.

73800785569 is the 135832-nd centered octagonal number.

It is an amenable number.

73800785569 is a deficient number, since it is larger than the sum of its proper divisors (12487117508).

73800785569 is an frugal number, since it uses more digits than its factorization.

73800785569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 12700800, while the sum is 58.

The spelling of 73800785569 in words is "seventy-three billion, eight hundred million, seven hundred eighty-five thousand, five hundred sixty-nine".