255690477827 has 4 divisors (see below), whose sum is σ = 256975354800. Its totient is φ = 254405600856.

The previous prime is 255690477817. The next prime is 255690477901. The reversal of 255690477827 is 728774096552.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255690477827 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 255690477827.

It is not an unprimeable number, because it can be changed into a prime (255690477817) 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, 642438188 + ... + 642438585.

It is an arithmetic number, because the mean of its divisors is an integer number (64243838700).

Almost surely, 2^255690477827 is an apocalyptic number.

255690477827 is a deficient number, since it is larger than the sum of its proper divisors (1284876973).

255690477827 is a wasteful number, since it uses less digits than its factorization.

255690477827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284876972.

The product of its (nonzero) digits is 59270400, while the sum is 62.

The spelling of 255690477827 in words is "two hundred fifty-five billion, six hundred ninety million, four hundred seventy-seven thousand, eight hundred twenty-seven".