77315423886 has 80 divisors (see below), whose sum is σ = 177659930448. Its totient is φ = 25116220800.

The previous prime is 77315423881. The next prime is 77315423891. The reversal of 77315423886 is 68832451377.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (77315423881) and next prime (77315423891).

It is a Harshad number since it is a multiple of its sum of digits (54).

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 39 ways as a sum of consecutive naturals, for example, 6722601 + ... + 6734091.

Almost surely, 2^77315423886 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77315423886, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88829965224).

77315423886 is an abundant number, since it is smaller than the sum of its proper divisors (100344506562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77315423886 is a wasteful number, since it uses less digits than its factorization.

77315423886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12559 (or 12550 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 54.

The spelling of 77315423886 in words is "seventy-seven billion, three hundred fifteen million, four hundred twenty-three thousand, eight hundred eighty-six".