255166467409 has 4 divisors (see below), whose sum is σ = 291618819904. Its totient is φ = 218714114916.

The previous prime is 255166467373. The next prime is 255166467419. The reversal of 255166467409 is 904764661552.

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 not a de Polignac number, because 255166467409 - 2⁹ = 255166466897 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 255166467409.

It is not an unprimeable number, because it can be changed into a prime (255166467419) 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, 18226176237 + ... + 18226176250.

It is an arithmetic number, because the mean of its divisors is an integer number (72904704976).

Almost surely, 2^255166467409 is an apocalyptic number.

It is an amenable number.

255166467409 is a deficient number, since it is larger than the sum of its proper divisors (36452352495).

255166467409 is an equidigital number, since it uses as much as digits as its factorization.

255166467409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36452352494.

The product of its (nonzero) digits is 10886400, while the sum is 55.

The spelling of 255166467409 in words is "two hundred fifty-five billion, one hundred sixty-six million, four hundred sixty-seven thousand, four hundred nine".