30153910781 has 2 divisors, whose sum is σ = 30153910782. Its totient is φ = 30153910780.

The previous prime is 30153910751. The next prime is 30153910793. The reversal of 30153910781 is 18701935103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20637908281 + 9516002500 = 143659^2 + 97550^2 .

It is an emirp because it is prime and its reverse (18701935103) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30153910781 is a prime.

It is a super-2 number, since 2×30153910781² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30153910751) 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 as a sum of consecutive naturals, namely, 15076955390 + 15076955391.

It is an arithmetic number, because the mean of its divisors is an integer number (15076955391).

Almost surely, 2^30153910781 is an apocalyptic number.

It is an amenable number.

30153910781 is a deficient number, since it is larger than the sum of its proper divisors (1).

30153910781 is an equidigital number, since it uses as much as digits as its factorization.

30153910781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 38.

The spelling of 30153910781 in words is "thirty billion, one hundred fifty-three million, nine hundred ten thousand, seven hundred eighty-one".