317181666401 has 4 divisors (see below), whose sum is σ = 319015086612. Its totient is φ = 315348246192.

The previous prime is 317181666341. The next prime is 317181666407. The reversal of 317181666401 is 104666181713.

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

It can be written as a sum of positive squares in 2 ways, for example, as 154087651600 + 163094014801 = 392540^2 + 403849^2 .

It is a cyclic number.

It is not a de Polignac number, because 317181666401 - 2⁶ = 317181666337 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (317181666407) 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, 916709846 + ... + 916710191.

It is an arithmetic number, because the mean of its divisors is an integer number (79753771653).

Almost surely, 2^317181666401 is an apocalyptic number.

It is an amenable number.

317181666401 is a deficient number, since it is larger than the sum of its proper divisors (1833420211).

317181666401 is a wasteful number, since it uses less digits than its factorization.

317181666401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1833420210.

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 317181666401 in words is "three hundred seventeen billion, one hundred eighty-one million, six hundred sixty-six thousand, four hundred one".