721779449802 has 16 divisors (see below), whose sum is σ = 1444315901472. Its totient is φ = 240466982960.

The previous prime is 721779449801. The next prime is 721779449861. The reversal of 721779449802 is 208944977127.

It is not an unprimeable number, because it can be changed into a prime (721779449801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31529349 + ... + 31552232.

It is an arithmetic number, because the mean of its divisors is an integer number (90269743842).

Almost surely, 2^721779449802 is an apocalyptic number.

721779449802 is an abundant number, since it is smaller than the sum of its proper divisors (722536451670).

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

721779449802 is a wasteful number, since it uses less digits than its factorization.

721779449802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63083493.

The product of its (nonzero) digits is 14224896, while the sum is 60.

The spelling of 721779449802 in words is "seven hundred twenty-one billion, seven hundred seventy-nine million, four hundred forty-nine thousand, eight hundred two".