255401777 has 4 divisors (see below), whose sum is σ = 263640576. Its totient is φ = 247162980.

The previous prime is 255401759. The next prime is 255401813. The reversal of 255401777 is 777104552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255401777 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 255401777.

It is not an unprimeable number, because it can be changed into a prime (255401747) 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, 4119353 + ... + 4119414.

It is an arithmetic number, because the mean of its divisors is an integer number (65910144).

Almost surely, 2^255401777 is an apocalyptic number.

It is an amenable number.

255401777 is a deficient number, since it is larger than the sum of its proper divisors (8238799).

255401777 is an equidigital number, since it uses as much as digits as its factorization.

255401777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8238798.

The product of its (nonzero) digits is 68600, while the sum is 38.

The square root of 255401777 is about 15981.2945971220. The cubic root of 255401777 is about 634.4654413735.

The spelling of 255401777 in words is "two hundred fifty-five million, four hundred one thousand, seven hundred seventy-seven".