318906419525 has 6 divisors (see below), whose sum is σ = 395443960242. Its totient is φ = 255125135600.

The previous prime is 318906419471. The next prime is 318906419527. The reversal of 318906419525 is 525914609813.

It is a Cunningham number, because it is equal to 564718²+1.

It can be written as a sum of positive squares in 3 ways, for example, as 1 + 318906419524 = 1^2 + 564718^2 .

It is not a de Polignac number, because 318906419525 - 2¹⁴ = 318906403141 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318906419527) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6378128366 + ... + 6378128415.

It is an arithmetic number, because the mean of its divisors is an integer number (65907326707).

Almost surely, 2^318906419525 is an apocalyptic number.

It is an amenable number.

318906419525 is a deficient number, since it is larger than the sum of its proper divisors (76537540717).

318906419525 is a wasteful number, since it uses less digits than its factorization.

318906419525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12756256791 (or 12756256786 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 53.

The spelling of 318906419525 in words is "three hundred eighteen billion, nine hundred six million, four hundred nineteen thousand, five hundred twenty-five".