77768543748 has 96 divisors (see below), whose sum is σ = 209073312000. Its totient is φ = 22038736896.

The previous prime is 77768543747. The next prime is 77768543761. The reversal of 77768543748 is 84734586777.

It is not an unprimeable number, because it can be changed into a prime (77768543747) 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 31 ways as a sum of consecutive naturals, for example, 19204828 + ... + 19208876.

It is an arithmetic number, because the mean of its divisors is an integer number (2177847000).

Almost surely, 2^77768543748 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 77768543748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104536656000).

77768543748 is an abundant number, since it is smaller than the sum of its proper divisors (131304768252).

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

77768543748 is a wasteful number, since it uses less digits than its factorization.

77768543748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5869 (or 5867 counting only the distinct ones).

The product of its digits is 221276160, while the sum is 66.

The spelling of 77768543748 in words is "seventy-seven billion, seven hundred sixty-eight million, five hundred forty-three thousand, seven hundred forty-eight".