30050785781 has 4 divisors (see below), whose sum is σ = 30063221292. Its totient is φ = 30038350272.

The previous prime is 30050785711. The next prime is 30050785823. The reversal of 30050785781 is 18758705003.

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 20783835556 + 9266950225 = 144166^2 + 96265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30050785781 is a prime.

It is a super-2 number, since 2×30050785781² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30050785711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6214130 + ... + 6218963.

It is an arithmetic number, because the mean of its divisors is an integer number (7515805323).

Almost surely, 2^30050785781 is an apocalyptic number.

It is an amenable number.

30050785781 is a deficient number, since it is larger than the sum of its proper divisors (12435511).

30050785781 is a wasteful number, since it uses less digits than its factorization.

30050785781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12435510.

The product of its (nonzero) digits is 235200, while the sum is 44.

The spelling of 30050785781 in words is "thirty billion, fifty million, seven hundred eighty-five thousand, seven hundred eighty-one".