721382744020 has 48 divisors (see below), whose sum is σ = 1604549338560. Its totient is φ = 271489042944.

The previous prime is 721382743897. The next prime is 721382744039. The reversal of 721382744020 is 20447283127.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 675067 + ... + 1377853.

It is an arithmetic number, because the mean of its divisors is an integer number (33428111220).

Almost surely, 2^721382744020 is an apocalyptic number.

It is an amenable number.

721382744020 is an abundant number, since it is smaller than the sum of its proper divisors (883166594540).

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

721382744020 is a wasteful number, since it uses less digits than its factorization.

721382744020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705832 (or 705830 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 40.

The spelling of 721382744020 in words is "seven hundred twenty-one billion, three hundred eighty-two million, seven hundred forty-four thousand, twenty".