30680400081 has 32 divisors (see below), whose sum is σ = 44731975680. Its totient is φ = 18638121600.

The previous prime is 30680400071. The next prime is 30680400083. The reversal of 30680400081 is 18000408603.

It is a happy number.

It is not a de Polignac number, because 30680400081 - 2¹⁴ = 30680383697 is a prime.

It is a super-2 number, since 2×30680400081² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30680400083) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73476 + ... + 258378.

It is an arithmetic number, because the mean of its divisors is an integer number (1397874240).

Almost surely, 2^30680400081 is an apocalyptic number.

It is an amenable number.

30680400081 is a deficient number, since it is larger than the sum of its proper divisors (14051575599).

30680400081 is a wasteful number, since it uses less digits than its factorization.

30680400081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185037.

The product of its (nonzero) digits is 4608, while the sum is 30.

Adding to 30680400081 its reverse (18000408603), we get a palindrome (48680808684).

The spelling of 30680400081 in words is "thirty billion, six hundred eighty million, four hundred thousand, eighty-one".