722437665321 has 4 divisors (see below), whose sum is σ = 963250220432. Its totient is φ = 481625110212.

The previous prime is 722437665319. The next prime is 722437665329. The reversal of 722437665321 is 123566734227.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 722437665321 - 2¹ = 722437665319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722437665329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120406277551 + ... + 120406277556.

It is an arithmetic number, because the mean of its divisors is an integer number (240812555108).

Almost surely, 2^722437665321 is an apocalyptic number.

It is an amenable number.

722437665321 is a deficient number, since it is larger than the sum of its proper divisors (240812555111).

722437665321 is a wasteful number, since it uses less digits than its factorization.

722437665321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240812555110.

The product of its digits is 2540160, while the sum is 48.

The spelling of 722437665321 in words is "seven hundred twenty-two billion, four hundred thirty-seven million, six hundred sixty-five thousand, three hundred twenty-one".