720736477444 has 9 divisors (see below), whose sum is σ = 1261291806901. Its totient is φ = 360367389760.

The previous prime is 720736477423. The next prime is 720736477453. The reversal of 720736477444 is 444774637027.

The square root of 720736477444 is 848962.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 509136477444 + 211600000000 = 713538^2 + 460000^2 .

It is a super-2 number, since 2×720736477444² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1485684 + ... + 1910164.

Almost surely, 2^720736477444 is an apocalyptic number.

720736477444 is the 848962-nd square number.

It is an amenable number.

720736477444 is a deficient number, since it is larger than the sum of its proper divisors (540555329457).

720736477444 is an frugal number, since it uses more digits than its factorization.

720736477444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848966 (or 424483 counting only the distinct ones).

The product of its (nonzero) digits is 22127616, while the sum is 55.

The spelling of 720736477444 in words is "seven hundred twenty billion, seven hundred thirty-six million, four hundred seventy-seven thousand, four hundred forty-four".