721572103680 has 640 divisors, whose sum is σ = 2467318081536. Its totient is φ = 179503104000.

The previous prime is 721572103673. The next prime is 721572103771. The reversal of 721572103680 is 86301275127.

It is a tau number, because it is divible by the number of its divisors (640).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1799431480 + ... + 1799431880.

Almost surely, 2^721572103680 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 721572103680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1233659040768).

721572103680 is an abundant number, since it is smaller than the sum of its proper divisors (1745745977856).

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

721572103680 is a wasteful number, since it uses less digits than its factorization.

721572103680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678 (or 662 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 42.

The spelling of 721572103680 in words is "seven hundred twenty-one billion, five hundred seventy-two million, one hundred three thousand, six hundred eighty".