722616688640 has 672 divisors, whose sum is σ = 2236532715648. Its totient is φ = 221577216000.

The previous prime is 722616688613. The next prime is 722616688657. The reversal of 722616688640 is 46886616227.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1567498010 + ... + 1567498470.

It is an arithmetic number, because the mean of its divisors is an integer number (3328173684).

Almost surely, 2^722616688640 is an apocalyptic number.

722616688640 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 722616688640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1118266357824).

722616688640 is an abundant number, since it is smaller than the sum of its proper divisors (1513916027008).

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

722616688640 is a wasteful number, since it uses less digits than its factorization.

722616688640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588 (or 557 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 56.

The spelling of 722616688640 in words is "seven hundred twenty-two billion, six hundred sixteen million, six hundred eighty-eight thousand, six hundred forty".