721253649376 has 48 divisors (see below), whose sum is σ = 1538353452384. Its totient is φ = 330892936704.

The previous prime is 721253649359. The next prime is 721253649377. The reversal of 721253649376 is 673946352127.

It is a happy number.

721253649376 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721253649377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5121495 + ... + 5260438.

It is an arithmetic number, because the mean of its divisors is an integer number (32049030258).

Almost surely, 2^721253649376 is an apocalyptic number.

It is an amenable number.

721253649376 is an abundant number, since it is smaller than the sum of its proper divisors (817099803008).

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

721253649376 is a wasteful number, since it uses less digits than its factorization.

721253649376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10382123 (or 10382115 counting only the distinct ones).

The product of its digits is 11430720, while the sum is 55.

The spelling of 721253649376 in words is "seven hundred twenty-one billion, two hundred fifty-three million, six hundred forty-nine thousand, three hundred seventy-six".