77830730233 has 4 divisors (see below), whose sum is σ = 82409008500. Its totient is φ = 73252451968.

The previous prime is 77830730209. The next prime is 77830730291. The reversal of 77830730233 is 33203703877.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44898643449 + 32932086784 = 211893^2 + 181472^2 .

It is a cyclic number.

It is not a de Polignac number, because 77830730233 - 2¹³ = 77830722041 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 77830730233.

It is not an unprimeable number, because it can be changed into a prime (77830770233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2289139108 + ... + 2289139141.

It is an arithmetic number, because the mean of its divisors is an integer number (20602252125).

Almost surely, 2^77830730233 is an apocalyptic number.

It is an amenable number.

77830730233 is a deficient number, since it is larger than the sum of its proper divisors (4578278267).

77830730233 is a wasteful number, since it uses less digits than its factorization.

77830730233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4578278266.

The product of its (nonzero) digits is 444528, while the sum is 43.

The spelling of 77830730233 in words is "seventy-seven billion, eight hundred thirty million, seven hundred thirty thousand, two hundred thirty-three".