721442857952 has 48 divisors (see below), whose sum is σ = 1426706265600. Its totient is φ = 359107636608.

The previous prime is 721442857951. The next prime is 721442857957. The reversal of 721442857952 is 259758244127.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721442857951) 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, 8080049 + ... + 8168847.

It is an arithmetic number, because the mean of its divisors is an integer number (29723047200).

Almost surely, 2^721442857952 is an apocalyptic number.

It is an amenable number.

721442857952 is a deficient number, since it is larger than the sum of its proper divisors (705263407648).

721442857952 is a wasteful number, since it uses less digits than its factorization.

721442857952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89943 (or 89935 counting only the distinct ones).

The product of its digits is 11289600, while the sum is 56.

The spelling of 721442857952 in words is "seven hundred twenty-one billion, four hundred forty-two million, eight hundred fifty-seven thousand, nine hundred fifty-two".