30105668391 has 4 divisors (see below), whose sum is σ = 40140891192. Its totient is φ = 20070445592.

The previous prime is 30105668371. The next prime is 30105668399. The reversal of 30105668391 is 19386650103.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30105668391 - 2¹⁴ = 30105652007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30105668399) 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, 5017611396 + ... + 5017611401.

It is an arithmetic number, because the mean of its divisors is an integer number (10035222798).

Almost surely, 2^30105668391 is an apocalyptic number.

30105668391 is a deficient number, since it is larger than the sum of its proper divisors (10035222801).

30105668391 is a wasteful number, since it uses less digits than its factorization.

30105668391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10035222800.

The product of its (nonzero) digits is 116640, while the sum is 42.

The spelling of 30105668391 in words is "thirty billion, one hundred five million, six hundred sixty-eight thousand, three hundred ninety-one".