255127840777 has 4 divisors (see below), whose sum is σ = 255337478676. Its totient is φ = 254918202880.

The previous prime is 255127840763. The next prime is 255127840787. The reversal of 255127840777 is 777048721552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34543567881 + 220584272896 = 185859^2 + 469664^2 .

It is a cyclic number.

It is not a de Polignac number, because 255127840777 - 2³¹ = 252980357129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255127840717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104817124 + ... + 104819557.

It is an arithmetic number, because the mean of its divisors is an integer number (63834369669).

Almost surely, 2^255127840777 is an apocalyptic number.

It is an amenable number.

255127840777 is a deficient number, since it is larger than the sum of its proper divisors (209637899).

255127840777 is a wasteful number, since it uses less digits than its factorization.

255127840777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209637898.

The product of its (nonzero) digits is 7683200, while the sum is 55.

The spelling of 255127840777 in words is "two hundred fifty-five billion, one hundred twenty-seven million, eight hundred forty thousand, seven hundred seventy-seven".