775599391055 has 16 divisors (see below), whose sum is σ = 933918501888. Its totient is φ = 618350304000.

The previous prime is 775599391043. The next prime is 775599391093. The reversal of 775599391055 is 550193995577.

It is a de Polignac number, because none of the positive numbers 2^k-775599391055 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 775599390982 and 775599391000.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1496690 + ... + 1947120.

It is an arithmetic number, because the mean of its divisors is an integer number (58369906368).

Almost surely, 2^775599391055 is an apocalyptic number.

775599391055 is a deficient number, since it is larger than the sum of its proper divisors (158319110833).

775599391055 is a wasteful number, since it uses less digits than its factorization.

775599391055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451618.

The product of its (nonzero) digits is 66976875, while the sum is 65.

The spelling of 775599391055 in words is "seven hundred seventy-five billion, five hundred ninety-nine million, three hundred ninety-one thousand, fifty-five".