720696445 has 16 divisors (see below), whose sum is σ = 991248768. Its totient is φ = 492759360.

The previous prime is 720696439. The next prime is 720696497. The reversal of 720696445 is 544696027.

It is a happy number.

It is not a de Polignac number, because 720696445 - 2³ = 720696437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 17526 + ... + 41815.

It is an arithmetic number, because the mean of its divisors is an integer number (61953048).

Almost surely, 2^720696445 is an apocalyptic number.

It is an amenable number.

720696445 is a deficient number, since it is larger than the sum of its proper divisors (270552323).

720696445 is a wasteful number, since it uses less digits than its factorization.

720696445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59700.

The product of its (nonzero) digits is 362880, while the sum is 43.

The square root of 720696445 is about 26845.7900796382. The cubic root of 720696445 is about 896.5698424738.

The spelling of 720696445 in words is "seven hundred twenty million, six hundred ninety-six thousand, four hundred forty-five".