775636012804 has 27 divisors (see below), whose sum is σ = 1441960331637. Its totient is φ = 364991091264.

The previous prime is 775636012799. The next prime is 775636012819. The reversal of 775636012804 is 408210636577.

The square root of 775636012804 is 880702.

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., 603868868100 + 171767144704 = 777090^2 + 414448^2 .

It is a super-2 number, since 2×775636012804² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 29930917 + ... + 29956819.

Almost surely, 2^775636012804 is an apocalyptic number.

775636012804 is the 880702-nd square number.

It is an amenable number.

775636012804 is a deficient number, since it is larger than the sum of its proper divisors (666324318833).

775636012804 is an frugal number, since it uses more digits than its factorization.

775636012804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51844 (or 25922 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 49.

Multiplying 775636012804 by its sum of digits (49), we get a square (38006164627396 = 6164914²).

The spelling of 775636012804 in words is "seven hundred seventy-five billion, six hundred thirty-six million, twelve thousand, eight hundred four".