721316479104 has 512 divisors, whose sum is σ = 2518306560000. Its totient is φ = 201114980352.

The previous prime is 721316479069. The next prime is 721316479129. The reversal of 721316479104 is 401974613127.

It is a happy number.

721316479104 is a `hidden beast` number, since 72 + 1 + 3 + 1 + 6 + 479 + 104 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 721316479104.

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, 19615167 + ... + 19651905.

It is an arithmetic number, because the mean of its divisors is an integer number (4918567500).

Almost surely, 2^721316479104 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 721316479104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1259153280000).

721316479104 is an abundant number, since it is smaller than the sum of its proper divisors (1796990080896).

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

721316479104 is a wasteful number, since it uses less digits than its factorization.

721316479104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36817 (or 36799 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The spelling of 721316479104 in words is "seven hundred twenty-one billion, three hundred sixteen million, four hundred seventy-nine thousand, one hundred four".