77753331133 has 4 divisors (see below), whose sum is σ = 77753951260. Its totient is φ = 77752711008.

The previous prime is 77753331127. The next prime is 77753331157. The reversal of 77753331133 is 33113335777.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 59761669444 + 17991661689 = 244462^2 + 134133^2 .

It is a cyclic number.

It is not a de Polignac number, because 77753331133 - 2²⁹ = 77216460221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77753331133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77753371133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48360 + ... + 397297.

It is an arithmetic number, because the mean of its divisors is an integer number (19438487815).

Almost surely, 2^77753331133 is an apocalyptic number.

It is an amenable number.

77753331133 is a deficient number, since it is larger than the sum of its proper divisors (620127).

77753331133 is a wasteful number, since it uses less digits than its factorization.

77753331133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620126.

The product of its digits is 416745, while the sum is 43.

The spelling of 77753331133 in words is "seventy-seven billion, seven hundred fifty-three million, three hundred thirty-one thousand, one hundred thirty-three".