255780673 has 8 divisors (see below), whose sum is σ = 263541096. Its totient is φ = 248092800.

The previous prime is 255780661. The next prime is 255780683. The reversal of 255780673 is 376087552.

It can be written as a sum of positive squares in 4 ways, for example, as 12794929 + 242985744 = 3577^2 + 15588^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255780673 is a prime.

It is a super-3 number, since 3×255780673³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255780683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10938 + ... + 25123.

It is an arithmetic number, because the mean of its divisors is an integer number (32942637).

Almost surely, 2^255780673 is an apocalyptic number.

It is an amenable number.

255780673 is a deficient number, since it is larger than the sum of its proper divisors (7760423).

255780673 is a wasteful number, since it uses less digits than its factorization.

255780673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36275.

The product of its (nonzero) digits is 352800, while the sum is 43.

The square root of 255780673 is about 15993.1445625931. The cubic root of 255780673 is about 634.7790356904.

The spelling of 255780673 in words is "two hundred fifty-five million, seven hundred eighty thousand, six hundred seventy-three".