30803409081 has 15 divisors (see below), whose sum is σ = 46017328863. Its totient is φ = 20534553000.

The previous prime is 30803409079. The next prime is 30803409103. The reversal of 30803409081 is 18090430803.

The square root of 30803409081 is 175509.

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

30803409081 is a `hidden beast` number, since 308 + 0 + 340 + 9 + 0 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16561373481 + 14242035600 = 128691^2 + 119340^2 .

It is not a de Polignac number, because 30803409081 - 2¹ = 30803409079 is a prime.

It is a super-2 number, since 2×30803409081² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30803409031) 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 14 ways as a sum of consecutive naturals, for example, 1569831 + ... + 1589331.

Almost surely, 2^30803409081 is an apocalyptic number.

30803409081 is the 175509-th square number.

30803409081 is the 87755-th centered octagonal number.

It is an amenable number.

30803409081 is a deficient number, since it is larger than the sum of its proper divisors (15213919782).

30803409081 is an frugal number, since it uses more digits than its factorization.

30803409081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39014 (or 19504 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

Multiplying 30803409081 by its sum of digits (36), we get a square (1108922726916 = 1053054²).

Multiplying 30803409081 by its product of nonzero digits (20736), we get a square (638739490703616 = 25273296²).

Adding to 30803409081 its reverse (18090430803), we get a palindrome (48893839884).

The spelling of 30803409081 in words is "thirty billion, eight hundred three million, four hundred nine thousand, eighty-one".