77932313228 has 144 divisors (see below), whose sum is σ = 182461870080. Its totient is φ = 28757433600.

The previous prime is 77932313219. The next prime is 77932313237. The reversal of 77932313228 is 82231323977.

It is an interprime number because it is at equal distance from previous prime (77932313219) and next prime (77932313237).

It is a Harshad number since it is a multiple of its sum of digits (47).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3128888 + ... + 3153696.

It is an arithmetic number, because the mean of its divisors is an integer number (1267096320).

Almost surely, 2^77932313228 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 77932313228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91230935040).

77932313228 is an abundant number, since it is smaller than the sum of its proper divisors (104529556852).

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

77932313228 is a wasteful number, since it uses less digits than its factorization.

77932313228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24916 (or 24907 counting only the distinct ones).

The product of its digits is 762048, while the sum is 47.

The spelling of 77932313228 in words is "seventy-seven billion, nine hundred thirty-two million, three hundred thirteen thousand, two hundred twenty-eight".