30355725643 has 4 divisors (see below), whose sum is σ = 30356137728. Its totient is φ = 30355313560.

The previous prime is 30355725607. The next prime is 30355725661. The reversal of 30355725643 is 34652755303.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30355725643 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30355725643.

It is not an unprimeable number, because it can be changed into a prime (30355755643) 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 3 ways as a sum of consecutive naturals, for example, 61963 + ... + 254068.

It is an arithmetic number, because the mean of its divisors is an integer number (7589034432).

Almost surely, 2^30355725643 is an apocalyptic number.

30355725643 is a deficient number, since it is larger than the sum of its proper divisors (412085).

30355725643 is an equidigital number, since it uses as much as digits as its factorization.

30355725643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412084.

The product of its (nonzero) digits is 1134000, while the sum is 43.

The spelling of 30355725643 in words is "thirty billion, three hundred fifty-five million, seven hundred twenty-five thousand, six hundred forty-three".