77609536488 has 144 divisors (see below), whose sum is σ = 231463028160. Its totient is φ = 23474784960.

The previous prime is 77609536447. The next prime is 77609536489. The reversal of 77609536488 is 88463590677.

77609536488 is a `hidden beast` number, since 7 + 7 + 60 + 95 + 3 + 6 + 488 = 666.

It is not an unprimeable number, because it can be changed into a prime (77609536489) 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 35 ways as a sum of consecutive naturals, for example, 4896945 + ... + 4912767.

It is an arithmetic number, because the mean of its divisors is an integer number (1607382140).

Almost surely, 2^77609536488 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 77609536488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115731514080).

77609536488 is an abundant number, since it is smaller than the sum of its proper divisors (153853491672).

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

77609536488 is a wasteful number, since it uses less digits than its factorization.

77609536488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16420 (or 16402 counting only the distinct ones).

The product of its (nonzero) digits is 60963840, while the sum is 63.

The spelling of 77609536488 in words is "seventy-seven billion, six hundred nine million, five hundred thirty-six thousand, four hundred eighty-eight".