722394224640 has 1152 divisors, whose sum is σ = 2920869020160. Its totient is φ = 163184640000.

The previous prime is 722394224611. The next prime is 722394224701. The reversal of 722394224640 is 46422493227.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (1152).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2878064515 + ... + 2878064765.

It is an arithmetic number, because the mean of its divisors is an integer number (2535476580).

Almost surely, 2^722394224640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 722394224640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1460434510080).

722394224640 is an abundant number, since it is smaller than the sum of its proper divisors (2198474795520).

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

722394224640 is a wasteful number, since it uses less digits than its factorization.

722394224640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479 (or 456 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 45.

The spelling of 722394224640 in words is "seven hundred twenty-two billion, three hundred ninety-four million, two hundred twenty-four thousand, six hundred forty".