775536776656 has 80 divisors (see below), whose sum is σ = 1587687270400. Its totient is φ = 366407556480.

The previous prime is 775536776633. The next prime is 775536776671. The reversal of 775536776656 is 656677635577.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100728295 + ... + 100735993.

It is an arithmetic number, because the mean of its divisors is an integer number (19846090880).

Almost surely, 2^775536776656 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 775536776656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (793843635200).

775536776656 is an abundant number, since it is smaller than the sum of its proper divisors (812150493744).

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

775536776656 is a wasteful number, since it uses less digits than its factorization.

775536776656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12504 (or 12498 counting only the distinct ones).

The product of its digits is 1166886000, while the sum is 70.

The spelling of 775536776656 in words is "seven hundred seventy-five billion, five hundred thirty-six million, seven hundred seventy-six thousand, six hundred fifty-six".