722719316641 has 9 divisors (see below), whose sum is σ = 840721229649. Its totient is φ = 619468599204.

The previous prime is 722719316629. The next prime is 722719316651. The reversal of 722719316641 is 146613917227.

The square root of 722719316641 is 850129.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 722719316641 - 2³⁹ = 172963502753 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (722719316621) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5890180 + ... + 6011626.

It is an arithmetic number, because the mean of its divisors is an integer number (93413469961).

Almost surely, 2^722719316641 is an apocalyptic number.

722719316641 is the 850129-th square number.

722719316641 is the 425065-th centered octagonal number.

It is an amenable number.

722719316641 is a deficient number, since it is larger than the sum of its proper divisors (118001913008).

722719316641 is an frugal number, since it uses more digits than its factorization.

722719316641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242908 (or 121454 counting only the distinct ones).

The product of its digits is 762048, while the sum is 49.

Multiplying 722719316641 by its sum of digits (49), we get a square (35413246515409 = 5950903²).

722719316641 divided by its sum of digits (49) gives a square (14749373809 = 121447²).

The spelling of 722719316641 in words is "seven hundred twenty-two billion, seven hundred nineteen million, three hundred sixteen thousand, six hundred forty-one".