721208231460 has 192 divisors, whose sum is σ = 2319774965760. Its totient is φ = 185826026880.

The previous prime is 721208231417. The next prime is 721208231509. The reversal of 721208231460 is 64132802127.

It is a happy number.

721208231460 is a `hidden beast` number, since 72 + 1 + 20 + 82 + 31 + 460 = 666.

721208231460 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 10730319 + ... + 10797321.

It is an arithmetic number, because the mean of its divisors is an integer number (12082161280).

Almost surely, 2^721208231460 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 721208231460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1159887482880).

721208231460 is an abundant number, since it is smaller than the sum of its proper divisors (1598566734300).

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

721208231460 is a wasteful number, since it uses less digits than its factorization.

721208231460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67695 (or 67687 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The spelling of 721208231460 in words is "seven hundred twenty-one billion, two hundred eight million, two hundred thirty-one thousand, four hundred sixty".