77860885622656 has 64 divisors (see below), whose sum is σ = 156720079454400. Its totient is φ = 38528056166400.

The previous prime is 77860885622623. The next prime is 77860885622687. The reversal of 77860885622656 is 65622658806877.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8629881 + ... + 15172231.

It is an arithmetic number, because the mean of its divisors is an integer number (2448751241475).

Almost surely, 2^{77860885622656} 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 77860885622656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78360039727200).

77860885622656 is an abundant number, since it is smaller than the sum of its proper divisors (78859193831744).

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

77860885622656 is a wasteful number, since it uses less digits than its factorization.

77860885622656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6543327 (or 6543315 counting only the distinct ones).

The product of its (nonzero) digits is 3251404800, while the sum is 76.

The spelling of 77860885622656 in words is "seventy-seven trillion, eight hundred sixty billion, eight hundred eighty-five million, six hundred twenty-two thousand, six hundred fifty-six".