77687258706 has 64 divisors (see below), whose sum is σ = 176496537600. Its totient is φ = 25318183248.

The previous prime is 77687258689. The next prime is 77687258783. The reversal of 77687258706 is 60785278677.

It is a Curzon number.

It is an unprimeable number.

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, 2479285 + ... + 2510423.

It is an arithmetic number, because the mean of its divisors is an integer number (2757758400).

Almost surely, 2^77687258706 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77687258706, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88248268800).

77687258706 is an abundant number, since it is smaller than the sum of its proper divisors (98809278894).

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

77687258706 is a wasteful number, since it uses less digits than its factorization.

77687258706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32180 (or 32174 counting only the distinct ones).

The product of its (nonzero) digits is 55319040, while the sum is 63.

The spelling of 77687258706 in words is "seventy-seven billion, six hundred eighty-seven million, two hundred fifty-eight thousand, seven hundred six".