30405545057 has 4 divisors (see below), whose sum is σ = 31112650800. Its totient is φ = 29698439316.

The previous prime is 30405545033. The next prime is 30405545087. The reversal of 30405545057 is 75054550403.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75054550403 = 7 ⋅10722078629.

It is a cyclic number.

It is not a de Polignac number, because 30405545057 - 2¹⁰ = 30405544033 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 30405545057.

It is not an unprimeable number, because it can be changed into a prime (30405545087) 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, 353552807 + ... + 353552892.

It is an arithmetic number, because the mean of its divisors is an integer number (7778162700).

Almost surely, 2^30405545057 is an apocalyptic number.

It is an amenable number.

30405545057 is a deficient number, since it is larger than the sum of its proper divisors (707105743).

30405545057 is an equidigital number, since it uses as much as digits as its factorization.

30405545057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707105742.

The product of its (nonzero) digits is 210000, while the sum is 38.

The spelling of 30405545057 in words is "thirty billion, four hundred five million, five hundred forty-five thousand, fifty-seven".