77381685248 has 104 divisors (see below), whose sum is σ = 177342358080. Its totient is φ = 33071431680.

The previous prime is 77381685247. The next prime is 77381685253. The reversal of 77381685248 is 84258618377.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77381685247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10863128 + ... + 10870248.

Almost surely, 2^77381685248 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77381685248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88671179040).

77381685248 is an abundant number, since it is smaller than the sum of its proper divisors (99960672832).

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

77381685248 is an equidigital number, since it uses as much as digits as its factorization.

77381685248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7531 (or 7509 counting only the distinct ones).

The product of its digits is 18063360, while the sum is 59.

The spelling of 77381685248 in words is "seventy-seven billion, three hundred eighty-one million, six hundred eighty-five thousand, two hundred forty-eight".