320788718672 has 10 divisors (see below), whose sum is σ = 621528142458. Its totient is φ = 160394359328.

The previous prime is 320788718669. The next prime is 320788718681. The reversal of 320788718672 is 276817887023.

It can be written as a sum of positive squares in only one way, i.e., 258100577296 + 62688141376 = 508036^2 + 250376^2 .

It is a super-2 number, since 2×320788718672² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10024647443 + ... + 10024647474.

Almost surely, 2^320788718672 is an apocalyptic number.

It is an amenable number.

320788718672 is a deficient number, since it is larger than the sum of its proper divisors (300739423786).

320788718672 is a wasteful number, since it uses less digits than its factorization.

320788718672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20049294925 (or 20049294919 counting only the distinct ones).

The product of its (nonzero) digits is 12644352, while the sum is 59.

The spelling of 320788718672 in words is "three hundred twenty billion, seven hundred eighty-eight million, seven hundred eighteen thousand, six hundred seventy-two".