77576473768789 has 4 divisors (see below), whose sum is σ = 78288184537420. Its totient is φ = 76864763000160.

The previous prime is 77576473768763. The next prime is 77576473768793. The reversal of 77576473768789 is 98786737467577.

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 32887449318564 + 44689024450225 = 5734758^2 + 6684985^2 .

It is a cyclic number.

It is not a de Polignac number, because 77576473768789 - 2⁴¹ = 75377450513237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77576473762789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355855384152 + ... + 355855384369.

It is an arithmetic number, because the mean of its divisors is an integer number (19572046134355).

Almost surely, 2^{77576473768789} is an apocalyptic number.

It is an amenable number.

77576473768789 is a deficient number, since it is larger than the sum of its proper divisors (711710768631).

77576473768789 is a wasteful number, since it uses less digits than its factorization.

77576473768789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711710768630.

The product of its digits is 146374179840, while the sum is 91.

The spelling of 77576473768789 in words is "seventy-seven trillion, five hundred seventy-six billion, four hundred seventy-three million, seven hundred sixty-eight thousand, seven hundred eighty-nine".