720656125 has 32 divisors (see below), whose sum is σ = 1072581120. Its totient is φ = 472665600.

The previous prime is 720656113. The next prime is 720656159. The reversal of 720656125 is 521656027.

It is not a de Polignac number, because 720656125 - 2⁹ = 720655613 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 2221 + ... + 38029.

It is an arithmetic number, because the mean of its divisors is an integer number (33518160).

Almost surely, 2^720656125 is an apocalyptic number.

It is an amenable number.

720656125 is a deficient number, since it is larger than the sum of its proper divisors (351924995).

720656125 is a wasteful number, since it uses less digits than its factorization.

720656125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35854 (or 35844 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 720656125 is about 26845.0391134004. The cubic root of 720656125 is about 896.5531223644.

The spelling of 720656125 in words is "seven hundred twenty million, six hundred fifty-six thousand, one hundred twenty-five".