30643222661 has 4 divisors (see below), whose sum is σ = 30652310892. Its totient is φ = 30634134432.

The previous prime is 30643222639. The next prime is 30643222663. The reversal of 30643222661 is 16622234603.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16622234603 = 13 ⋅1278633431.

It can be written as a sum of positive squares in 2 ways, for example, as 28791641761 + 1851580900 = 169681^2 + 43030^2 .

It is a cyclic number.

It is not a de Polignac number, because 30643222661 - 2²⁶ = 30576113797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30643222663) 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 3 ways as a sum of consecutive naturals, for example, 4539056 + ... + 4545801.

It is an arithmetic number, because the mean of its divisors is an integer number (7663077723).

Almost surely, 2^30643222661 is an apocalyptic number.

It is an amenable number.

30643222661 is a deficient number, since it is larger than the sum of its proper divisors (9088231).

30643222661 is an equidigital number, since it uses as much as digits as its factorization.

30643222661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9088230.

The product of its (nonzero) digits is 62208, while the sum is 35.

The spelling of 30643222661 in words is "thirty billion, six hundred forty-three million, two hundred twenty-two thousand, six hundred sixty-one".