731668519988 has 18 divisors (see below), whose sum is σ = 1489468058946. Its totient is φ = 313572222768.

The previous prime is 731668519979. The next prime is 731668519999. The reversal of 731668519988 is 889915866137.

It can be written as a sum of positive squares in only one way, i.e., 508637123344 + 223031396644 = 713188^2 + 472262^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1866501131 + ... + 1866501522.

It is an arithmetic number, because the mean of its divisors is an integer number (82748225497).

Almost surely, 2^731668519988 is an apocalyptic number.

It is an amenable number.

731668519988 is an abundant number, since it is smaller than the sum of its proper divisors (757799538958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

731668519988 is a wasteful number, since it uses less digits than its factorization.

731668519988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3733002671 (or 3733002662 counting only the distinct ones).

The product of its digits is 156764160, while the sum is 71.

The spelling of 731668519988 in words is "seven hundred thirty-one billion, six hundred sixty-eight million, five hundred nineteen thousand, nine hundred eighty-eight".