775655556577 has 16 divisors (see below), whose sum is σ = 849839739840. Its totient is φ = 702087486400.

The previous prime is 775655556539. The next prime is 775655556623.

775655556577 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 775655556577 - 2³¹ = 773508072929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (775655556677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3405999 + ... + 3626587.

It is an arithmetic number, because the mean of its divisors is an integer number (53114983740).

Almost surely, 2^775655556577 is an apocalyptic number.

It is an amenable number.

775655556577 is a deficient number, since it is larger than the sum of its proper divisors (74184183263).

775655556577 is a wasteful number, since it uses less digits than its factorization.

775655556577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221984.

The product of its digits is 1350562500, while the sum is 70.

The spelling of 775655556577 in words is "seven hundred seventy-five billion, six hundred fifty-five million, five hundred fifty-six thousand, five hundred seventy-seven".