255078356865 has 24 divisors (see below), whose sum is σ = 419453939520. Its totient is φ = 132364974528.

The previous prime is 255078356831. The next prime is 255078356881. The reversal of 255078356865 is 568653870552.

It is a happy number.

It is not a de Polignac number, because 255078356865 - 2¹⁸ = 255078094721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 255078356799 and 255078356808.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6190285 + ... + 6231354.

It is an arithmetic number, because the mean of its divisors is an integer number (17477247480).

Almost surely, 2^255078356865 is an apocalyptic number.

It is an amenable number.

255078356865 is a deficient number, since it is larger than the sum of its proper divisors (164375582655).

255078356865 is a wasteful number, since it uses less digits than its factorization.

255078356865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12421721 (or 12421684 counting only the distinct ones).

The product of its (nonzero) digits is 60480000, while the sum is 60.

The spelling of 255078356865 in words is "two hundred fifty-five billion, seventy-eight million, three hundred fifty-six thousand, eight hundred sixty-five".