77315423885 has 16 divisors (see below), whose sum is σ = 107023545216. Its totient is φ = 52520808768.

The previous prime is 77315423881. The next prime is 77315423891. The reversal of 77315423885 is 58832451377.

It is a cyclic number.

It is not a de Polignac number, because 77315423885 - 2² = 77315423881 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77315423881) 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 15 ways as a sum of consecutive naturals, for example, 10318742 + ... + 10326231.

It is an arithmetic number, because the mean of its divisors is an integer number (6688971576).

Almost surely, 2^77315423885 is an apocalyptic number.

It is an amenable number.

77315423885 is a deficient number, since it is larger than the sum of its proper divisors (29708121331).

77315423885 is a wasteful number, since it uses less digits than its factorization.

77315423885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20645092.

The product of its digits is 5644800, while the sum is 53.

The spelling of 77315423885 in words is "seventy-seven billion, three hundred fifteen million, four hundred twenty-three thousand, eight hundred eighty-five".