767378816065 has 16 divisors (see below), whose sum is σ = 956560960080. Its totient is φ = 590274478080.

The previous prime is 767378816047. The next prime is 767378816089. The reversal of 767378816065 is 560618873767.

It can be written as a sum of positive squares in 8 ways, for example, as 108617703184 + 658761112881 = 329572^2 + 811641^2 .

It is not a de Polignac number, because 767378816065 - 2¹³ = 767378807873 is a prime.

It is a super-2 number, since 2×767378816065² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 767378815988 and 767378816006.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10944864 + ... + 11014753.

It is an arithmetic number, because the mean of its divisors is an integer number (59785060005).

Almost surely, 2^767378816065 is an apocalyptic number.

It is an amenable number.

767378816065 is a deficient number, since it is larger than the sum of its proper divisors (189182144015).

767378816065 is a wasteful number, since it uses less digits than its factorization.

767378816065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21959892.

The product of its (nonzero) digits is 71124480, while the sum is 64.

The spelling of 767378816065 in words is "seven hundred sixty-seven billion, three hundred seventy-eight million, eight hundred sixteen thousand, sixty-five".