721145007704 has 64 divisors (see below), whose sum is σ = 1524206868480. Its totient is φ = 316895328000.

The previous prime is 721145007697. The next prime is 721145007839. The reversal of 721145007704 is 407700541127.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2547164 + ... + 2816084.

It is an arithmetic number, because the mean of its divisors is an integer number (23815732320).

Almost surely, 2^721145007704 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 721145007704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (762103434240).

721145007704 is an abundant number, since it is smaller than the sum of its proper divisors (803061860776).

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

721145007704 is a wasteful number, since it uses less digits than its factorization.

721145007704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269952 (or 269948 counting only the distinct ones).

The product of its (nonzero) digits is 54880, while the sum is 38.

The spelling of 721145007704 in words is "seven hundred twenty-one billion, one hundred forty-five million, seven thousand, seven hundred four".