775800057856 has 52 divisors (see below), whose sum is σ = 1552468996792. Its totient is φ = 387635429376.

The previous prime is 775800057811. The next prime is 775800057859. The reversal of 775800057856 is 658750008577.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 775800057856.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (775800057859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6010510 + ... + 6138226.

Almost surely, 2^775800057856 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 775800057856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (776234498396).

775800057856 is an abundant number, since it is smaller than the sum of its proper divisors (776668938936).

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

775800057856 is a wasteful number, since it uses less digits than its factorization.

775800057856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129224 (or 129202 counting only the distinct ones).

The product of its (nonzero) digits is 16464000, while the sum is 58.

The spelling of 775800057856 in words is "seven hundred seventy-five billion, eight hundred million, fifty-seven thousand, eight hundred fifty-six".