77739074368 has 56 divisors (see below), whose sum is σ = 159113857032. Its totient is φ = 37656428544.

The previous prime is 77739074339. The next prime is 77739074401. The reversal of 77739074368 is 86347093777.

It can be written as a sum of positive squares in 4 ways, for example, as 19962298944 + 57776775424 = 141288^2 + 240368^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 481296 + ... + 622192.

Almost surely, 2^77739074368 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 77739074368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79556928516).

77739074368 is an abundant number, since it is smaller than the sum of its proper divisors (81374782664).

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

77739074368 is a wasteful number, since it uses less digits than its factorization.

77739074368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141179 (or 141169 counting only the distinct ones).

The product of its (nonzero) digits is 37340352, while the sum is 61.

The spelling of 77739074368 in words is "seventy-seven billion, seven hundred thirty-nine million, seventy-four thousand, three hundred sixty-eight".