30806997637 has 8 divisors (see below), whose sum is σ = 33182894304. Its totient is φ = 28431976368.

The previous prime is 30806997619. The next prime is 30806997643. The reversal of 30806997637 is 73679960803.

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

It is a cyclic number.

It is not a de Polignac number, because 30806997637 - 2¹¹ = 30806995589 is a prime.

It is a super-2 number, since 2×30806997637² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30806997647) 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, 144823 + ... + 287380.

It is an arithmetic number, because the mean of its divisors is an integer number (4147861788).

Almost surely, 2^30806997637 is an apocalyptic number.

It is an amenable number.

30806997637 is a deficient number, since it is larger than the sum of its proper divisors (2375896667).

30806997637 is a wasteful number, since it uses less digits than its factorization.

30806997637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437699.

The product of its (nonzero) digits is 10287648, while the sum is 58.

The spelling of 30806997637 in words is "thirty billion, eight hundred six million, nine hundred ninety-seven thousand, six hundred thirty-seven".