720784878624 has 72 divisors (see below), whose sum is σ = 2049815139372. Its totient is φ = 240251880960.

The previous prime is 720784878601. The next prime is 720784878683. The reversal of 720784878624 is 426878487027.

720784878624 is a `hidden beast` number, since 7 + 2 + 0 + 78 + 487 + 86 + 2 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 652004571024 + 68780307600 = 807468^2 + 262260^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12118462 + ... + 12177794.

Almost surely, 2^720784878624 is an apocalyptic number.

It is an amenable number.

720784878624 is an abundant number, since it is smaller than the sum of its proper divisors (1329030260748).

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

720784878624 is a wasteful number, since it uses less digits than its factorization.

720784878624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101530 (or 101519 counting only the distinct ones).

The product of its (nonzero) digits is 67436544, while the sum is 63.

The spelling of 720784878624 in words is "seven hundred twenty billion, seven hundred eighty-four million, eight hundred seventy-eight thousand, six hundred twenty-four".