77585525688 has 64 divisors (see below), whose sum is σ = 212319273600. Its totient is φ = 23430500480.

The previous prime is 77585525681. The next prime is 77585525723. The reversal of 77585525688 is 88652558577.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77585525681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 424158 + ... + 578861.

It is an arithmetic number, because the mean of its divisors is an integer number (3317488650).

Almost surely, 2^77585525688 is an apocalyptic number.

It is an amenable number.

77585525688 is an abundant number, since it is smaller than the sum of its proper divisors (134733747912).

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

77585525688 is a wasteful number, since it uses less digits than its factorization.

77585525688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003332 (or 1003328 counting only the distinct ones).

The product of its digits is 188160000, while the sum is 66.

The spelling of 77585525688 in words is "seventy-seven billion, five hundred eighty-five million, five hundred twenty-five thousand, six hundred eighty-eight".