722724171912 has 36 divisors (see below), whose sum is σ = 1957397502645. Its totient is φ = 240905652768.

The previous prime is 722724171893. The next prime is 722724171929. The reversal of 722724171912 is 219171427227.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

722724171912 is a `hidden beast` number, since 7 + 227 + 2 + 417 + 1 + 9 + 1 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 638423372196 + 84300799716 = 799014^2 + 290346^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=601134.

It is a super-2 number, since 2×722724171912² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7163514 + ... + 7263702.

Almost surely, 2^722724171912 is an apocalyptic number.

722724171912 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

722724171912 is an abundant number, since it is smaller than the sum of its proper divisors (1234673330733).

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

722724171912 is an frugal number, since it uses more digits than its factorization.

722724171912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200390 (or 100194 counting only the distinct ones).

The product of its digits is 197568, while the sum is 45.

The spelling of 722724171912 in words is "seven hundred twenty-two billion, seven hundred twenty-four million, one hundred seventy-one thousand, nine hundred twelve".