721022317346 has 16 divisors (see below), whose sum is σ = 1113329435064. Its totient is φ = 349957511424.

The previous prime is 721022317333. The next prime is 721022317349. The reversal of 721022317346 is 643713220127.

It can be written as a sum of positive squares in 4 ways, for example, as 718298625625 + 2723691721 = 847525^2 + 52189^2 .

It is a super-2 number, since 2×721022317346² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (721022317349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11219165 + ... + 11283248.

Almost surely, 2^721022317346 is an apocalyptic number.

721022317346 is a deficient number, since it is larger than the sum of its proper divisors (392307117718).

721022317346 is a wasteful number, since it uses less digits than its factorization.

721022317346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22502885.

The product of its (nonzero) digits is 84672, while the sum is 38.

The spelling of 721022317346 in words is "seven hundred twenty-one billion, twenty-two million, three hundred seventeen thousand, three hundred forty-six".