318884728868 has 6 divisors (see below), whose sum is σ = 558048275526. Its totient is φ = 159442364432.

The previous prime is 318884728817. The next prime is 318884728931. The reversal of 318884728868 is 868827488813.

It can be written as a sum of positive squares in only one way, i.e., 240592212004 + 78292516864 = 490502^2 + 279808^2 .

It is a super-2 number, since 2×318884728868² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39860591105 + ... + 39860591112.

It is an arithmetic number, because the mean of its divisors is an integer number (93008045921).

Almost surely, 2^318884728868 is an apocalyptic number.

It is an amenable number.

318884728868 is a deficient number, since it is larger than the sum of its proper divisors (239163546658).

318884728868 is a wasteful number, since it uses less digits than its factorization.

318884728868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79721182221 (or 79721182219 counting only the distinct ones).

The product of its digits is 264241152, while the sum is 71.

The spelling of 318884728868 in words is "three hundred eighteen billion, eight hundred eighty-four million, seven hundred twenty-eight thousand, eight hundred sixty-eight".