720434465522 has 18 divisors (see below), whose sum is σ = 1091432630223. Its totient is φ = 356658759612.

The previous prime is 720434465447. The next prime is 720434465537. The reversal of 720434465522 is 225564434027.

It can be written as a sum of positive squares in only one way, i.e., 360217232761 + 360217232761 = 600181^2 + 600181^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=600181.

It is a super-2 number, since 2×720434465522² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 123634373 + ... + 123640199.

Almost surely, 2^720434465522 is an apocalyptic number.

720434465522 is a deficient number, since it is larger than the sum of its proper divisors (370998164701).

720434465522 is an frugal number, since it uses more digits than its factorization.

720434465522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11862 (or 5932 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 44.

Adding to 720434465522 its reverse (225564434027), we get a palindrome (945998899549).

The spelling of 720434465522 in words is "seven hundred twenty billion, four hundred thirty-four million, four hundred sixty-five thousand, five hundred twenty-two".