720512515 has 16 divisors (see below), whose sum is σ = 885823488. Its totient is φ = 562304736.

The previous prime is 720512497. The next prime is 720512539. The reversal of 720512515 is 515215027.

It is a cyclic number.

It is not a de Polignac number, because 720512515 - 2⁵ = 720512483 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 232164 + ... + 235246.

It is an arithmetic number, because the mean of its divisors is an integer number (55363968).

Almost surely, 2^720512515 is an apocalyptic number.

720512515 is a deficient number, since it is larger than the sum of its proper divisors (165310973).

720512515 is a wasteful number, since it uses less digits than its factorization.

720512515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4218.

The product of its (nonzero) digits is 3500, while the sum is 28.

The square root of 720512515 is about 26842.3641842517. The cubic root of 720512515 is about 896.4935643483.

The spelling of 720512515 in words is "seven hundred twenty million, five hundred twelve thousand, five hundred fifteen".