77773576393 has 4 divisors (see below), whose sum is σ = 77774706580. Its totient is φ = 77772446208.

The previous prime is 77773576379. The next prime is 77773576411. The reversal of 77773576393 is 39367537777.

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 7671482569 + 70102093824 = 87587^2 + 264768^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77773576393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77773576373) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 454680 + ... + 601897.

It is an arithmetic number, because the mean of its divisors is an integer number (19443676645).

Almost surely, 2^77773576393 is an apocalyptic number.

It is an amenable number.

77773576393 is a deficient number, since it is larger than the sum of its proper divisors (1130187).

77773576393 is a wasteful number, since it uses less digits than its factorization.

77773576393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130186.

The product of its digits is 122523030, while the sum is 64.

The spelling of 77773576393 in words is "seventy-seven billion, seven hundred seventy-three million, five hundred seventy-six thousand, three hundred ninety-three".