77929243392 has 576 divisors, whose sum is σ = 280603459584. Its totient is φ = 18541854720.

The previous prime is 77929243361. The next prime is 77929243393. The reversal of 77929243392 is 29334292977.

It is not an unprimeable number, because it can be changed into a prime (77929243393) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 128383953 + ... + 128384559.

It is an arithmetic number, because the mean of its divisors is an integer number (487158784).

Almost surely, 2^77929243392 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 77929243392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140301729792).

77929243392 is an abundant number, since it is smaller than the sum of its proper divisors (202674216192).

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

77929243392 is a wasteful number, since it uses less digits than its factorization.

77929243392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824 (or 810 counting only the distinct ones).

The product of its digits is 10287648, while the sum is 57.

The spelling of 77929243392 in words is "seventy-seven billion, nine hundred twenty-nine million, two hundred forty-three thousand, three hundred ninety-two".