721172322752712 has 32 divisors (see below), whose sum is σ = 1819471456492800. Its totient is φ = 238185354302784.

The previous prime is 721172322752689. The next prime is 721172322752743. The reversal of 721172322752712 is 217257223271127.

It is a super-2 number, since 2×721172322752712² (a number of 31 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137838744088 + ... + 137838749319.

It is an arithmetic number, because the mean of its divisors is an integer number (56858483015400).

Almost surely, 2^{721172322752712} is an apocalyptic number.

It is an amenable number.

721172322752712 is an abundant number, since it is smaller than the sum of its proper divisors (1098299133740088).

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

721172322752712 is a wasteful number, since it uses less digits than its factorization.

721172322752712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275677493525 (or 275677493521 counting only the distinct ones).

The product of its digits is 2304960, while the sum is 51.

The spelling of 721172322752712 in words is "seven hundred twenty-one trillion, one hundred seventy-two billion, three hundred twenty-two million, seven hundred fifty-two thousand, seven hundred twelve".