30061808681 has 4 divisors (see below), whose sum is σ = 30342760272. Its totient is φ = 29780857092.

The previous prime is 30061808677. The next prime is 30061808687. The reversal of 30061808681 is 18680816003.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 30061808681 - 2² = 30061808677 is a prime.

It is a super-2 number, since 2×30061808681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30061808687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140475635 + ... + 140475848.

It is an arithmetic number, because the mean of its divisors is an integer number (7585690068).

Almost surely, 2^30061808681 is an apocalyptic number.

It is an amenable number.

30061808681 is a deficient number, since it is larger than the sum of its proper divisors (280951591).

30061808681 is a wasteful number, since it uses less digits than its factorization.

30061808681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280951590.

The product of its (nonzero) digits is 55296, while the sum is 41.

The spelling of 30061808681 in words is "thirty billion, sixty-one million, eight hundred eight thousand, six hundred eighty-one".