77736813448 has 32 divisors (see below), whose sum is σ = 167325903360. Its totient is φ = 33166373760.

The previous prime is 77736813439. The next prime is 77736813457. The reversal of 77736813448 is 84431863777.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (77736813439) and next prime (77736813457).

It is a junction number, because it is equal to n+sod(n) for n = 77736813392 and 77736813401.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3099973 + ... + 3124948.

It is an arithmetic number, because the mean of its divisors is an integer number (5228934480).

Almost surely, 2^77736813448 is an apocalyptic number.

It is an amenable number.

77736813448 is an abundant number, since it is smaller than the sum of its proper divisors (89589089912).

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

77736813448 is a wasteful number, since it uses less digits than its factorization.

77736813448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6225157 (or 6225153 counting only the distinct ones).

The product of its digits is 18966528, while the sum is 58.

The spelling of 77736813448 in words is "seventy-seven billion, seven hundred thirty-six million, eight hundred thirteen thousand, four hundred forty-eight".