318648408377 has 8 divisors (see below), whose sum is σ = 343499937480. Its totient is φ = 293845466880.

The previous prime is 318648408373. The next prime is 318648408401. The reversal of 318648408377 is 773804846813.

It can be written as a sum of positive squares in 4 ways, for example, as 1976602681 + 316671805696 = 44459^2 + 562736^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 318648408377 - 2² = 318648408373 is a prime.

It is a super-2 number, since 2×318648408377² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (318648408373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12133274 + ... + 12159507.

It is an arithmetic number, because the mean of its divisors is an integer number (42937492185).

Almost surely, 2^318648408377 is an apocalyptic number.

It is an amenable number.

318648408377 is a deficient number, since it is larger than the sum of its proper divisors (24851529103).

318648408377 is a wasteful number, since it uses less digits than its factorization.

318648408377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24293803.

The product of its (nonzero) digits is 21676032, while the sum is 59.

The spelling of 318648408377 in words is "three hundred eighteen billion, six hundred forty-eight million, four hundred eight thousand, three hundred seventy-seven".