318195617255 has 4 divisors (see below), whose sum is σ = 381834740712. Its totient is φ = 254556493800.

The previous prime is 318195617251. The next prime is 318195617261. The reversal of 318195617255 is 552716591813.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 552716591813 = 4513 ⋅122472101.

It is not a de Polignac number, because 318195617255 - 2² = 318195617251 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 318195617197 and 318195617206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318195617251) 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, 31819561721 + ... + 31819561730.

It is an arithmetic number, because the mean of its divisors is an integer number (95458685178).

Almost surely, 2^318195617255 is an apocalyptic number.

318195617255 is a deficient number, since it is larger than the sum of its proper divisors (63639123457).

318195617255 is an equidigital number, since it uses as much as digits as its factorization.

318195617255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63639123456.

The product of its digits is 2268000, while the sum is 53.

The spelling of 318195617255 in words is "three hundred eighteen billion, one hundred ninety-five million, six hundred seventeen thousand, two hundred fifty-five".