255470399566 has 4 divisors (see below), whose sum is σ = 383205599352. Its totient is φ = 127735199782.

The previous prime is 255470399551. The next prime is 255470399593. The reversal of 255470399566 is 665993074552.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63867599890 + ... + 63867599893.

It is an arithmetic number, because the mean of its divisors is an integer number (95801399838).

Almost surely, 2^255470399566 is an apocalyptic number.

255470399566 is a deficient number, since it is larger than the sum of its proper divisors (127735199786).

255470399566 is a wasteful number, since it uses less digits than its factorization.

255470399566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127735199785.

The product of its (nonzero) digits is 61236000, while the sum is 61.

The spelling of 255470399566 in words is "two hundred fifty-five billion, four hundred seventy million, three hundred ninety-nine thousand, five hundred sixty-six".