721010357860 has 96 divisors (see below), whose sum is σ = 1665176486400. Its totient is φ = 260610685440.

The previous prime is 721010357831. The next prime is 721010357869. The reversal of 721010357860 is 68753010127.

It is a super-2 number, since 2×721010357860² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (721010357869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3567930 + ... + 3764590.

It is an arithmetic number, because the mean of its divisors is an integer number (17345588400).

Almost surely, 2^721010357860 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 721010357860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (832588243200).

721010357860 is an abundant number, since it is smaller than the sum of its proper divisors (944166128540).

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

721010357860 is a wasteful number, since it uses less digits than its factorization.

721010357860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196981 (or 196979 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 40.

Adding to 721010357860 its reverse (68753010127), we get a palindrome (789763367987).

The spelling of 721010357860 in words is "seven hundred twenty-one billion, ten million, three hundred fifty-seven thousand, eight hundred sixty".