720610522 has 8 divisors (see below), whose sum is σ = 1081123956. Its totient is φ = 360235872.

The previous prime is 720610519. The next prime is 720610523. The reversal of 720610522 is 225016027.

It can be written as a sum of positive squares in 2 ways, for example, as 683874801 + 36735721 = 26151^2 + 6061^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×720610522² = 1038559048834224968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (720610523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20563 + ... + 43174.

Almost surely, 2^720610522 is an apocalyptic number.

720610522 is a deficient number, since it is larger than the sum of its proper divisors (360513434).

720610522 is a wasteful number, since it uses less digits than its factorization.

720610522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69392.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 720610522 is about 26844.1897251528. The cubic root of 720610522 is about 896.5342107212.

Adding to 720610522 its reverse (225016027), we get a palindrome (945626549).

The spelling of 720610522 in words is "seven hundred twenty million, six hundred ten thousand, five hundred twenty-two".