30556421125393 has 4 divisors (see below), whose sum is σ = 30751048011700. Its totient is φ = 30361794239088.

The previous prime is 30556421125357. The next prime is 30556421125403. The reversal of 30556421125393 is 39352112465503.

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

It can be written as a sum of positive squares in 2 ways, for example, as 23169859266064 + 7386561859329 = 4813508^2 + 2717823^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30556421125393 is a prime.

It is a super-2 number, since 2×30556421125393² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30556421125303) 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, 97313442918 + ... + 97313443231.

It is an arithmetic number, because the mean of its divisors is an integer number (7687762002925).

Almost surely, 2^{30556421125393} is an apocalyptic number.

It is an amenable number.

30556421125393 is a deficient number, since it is larger than the sum of its proper divisors (194626886307).

30556421125393 is a wasteful number, since it uses less digits than its factorization.

30556421125393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194626886306.

The product of its (nonzero) digits is 2916000, while the sum is 49.

The spelling of 30556421125393 in words is "thirty trillion, five hundred fifty-six billion, four hundred twenty-one million, one hundred twenty-five thousand, three hundred ninety-three".