603404257681 has 9 divisors (see below), whose sum is σ = 609516959419. Its totient is φ = 597352279000.

The previous prime is 603404257679. The next prime is 603404257691. The reversal of 603404257681 is 186752404306.

The square root of 603404257681 is 776791.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 579743665281 + 23660592400 = 761409^2 + 153820^2 .

It is not a de Polignac number, because 603404257681 - 2¹ = 603404257679 is a prime.

It is a super-2 number, since 2×603404257681² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (603404257691) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 78452046 + ... + 78459736.

Almost surely, 2^603404257681 is an apocalyptic number.

603404257681 is the 776791-st square number.

603404257681 is the 388396-th centered octagonal number.

It is an amenable number.

603404257681 is a deficient number, since it is larger than the sum of its proper divisors (6112701738).

603404257681 is an frugal number, since it uses more digits than its factorization.

603404257681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15584 (or 7792 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 46.

The spelling of 603404257681 in words is "six hundred three billion, four hundred four million, two hundred fifty-seven thousand, six hundred eighty-one".