255751630065 has 16 divisors (see below), whose sum is σ = 454669564800. Its totient is φ = 136400869296.

The previous prime is 255751630063. The next prime is 255751630091. The reversal of 255751630065 is 560036157552.

255751630065 is a `hidden beast` number, since 2 + 5 + 5 + 7 + 5 + 1 + 630 + 0 + 6 + 5 = 666.

It is not a de Polignac number, because 255751630065 - 2¹ = 255751630063 is a prime.

It is a super-2 number, since 2×255751630065² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 255751630065.

It is not an unprimeable number, because it can be changed into a prime (255751630063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 947228125 + ... + 947228394.

It is an arithmetic number, because the mean of its divisors is an integer number (28416847800).

Almost surely, 2^255751630065 is an apocalyptic number.

It is an amenable number.

255751630065 is a deficient number, since it is larger than the sum of its proper divisors (198917934735).

255751630065 is a wasteful number, since it uses less digits than its factorization.

255751630065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1894456533 (or 1894456527 counting only the distinct ones).

The product of its (nonzero) digits is 945000, while the sum is 45.

The spelling of 255751630065 in words is "two hundred fifty-five billion, seven hundred fifty-one million, six hundred thirty thousand, sixty-five".