77860522447 has 4 divisors (see below), whose sum is σ = 77880373560. Its totient is φ = 77840671336.

The previous prime is 77860522409. The next prime is 77860522457. The reversal of 77860522447 is 74422506877.

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

It is a cyclic number.

It is not a de Polignac number, because 77860522447 - 2⁷ = 77860522319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77860522394 and 77860522403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77860522457) 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, 9919672 + ... + 9927517.

It is an arithmetic number, because the mean of its divisors is an integer number (19470093390).

Almost surely, 2^77860522447 is an apocalyptic number.

77860522447 is a deficient number, since it is larger than the sum of its proper divisors (19851113).

77860522447 is a wasteful number, since it uses less digits than its factorization.

77860522447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19851112.

The product of its (nonzero) digits is 5268480, while the sum is 52.

The spelling of 77860522447 in words is "seventy-seven billion, eight hundred sixty million, five hundred twenty-two thousand, four hundred forty-seven".