30012561681 has 8 divisors (see below), whose sum is σ = 41307611904. Its totient is φ = 19362942960.

The previous prime is 30012561673. The next prime is 30012561703. The reversal of 30012561681 is 18616521003.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30012561681 - 2³ = 30012561673 is a prime.

It is a super-2 number, since 2×30012561681² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30012561611) 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 7 ways as a sum of consecutive naturals, for example, 161357766 + ... + 161357951.

It is an arithmetic number, because the mean of its divisors is an integer number (5163451488).

Almost surely, 2^30012561681 is an apocalyptic number.

30012561681 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

30012561681 is a deficient number, since it is larger than the sum of its proper divisors (11295050223).

30012561681 is a wasteful number, since it uses less digits than its factorization.

30012561681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322715751.

The product of its (nonzero) digits is 8640, while the sum is 33.

The spelling of 30012561681 in words is "thirty billion, twelve million, five hundred sixty-one thousand, six hundred eighty-one".