30136556381 has 2 divisors, whose sum is σ = 30136556382. Its totient is φ = 30136556380.

The previous prime is 30136556299. The next prime is 30136556441. The reversal of 30136556381 is 18365563103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25284180100 + 4852376281 = 159010^2 + 69659^2 .

It is an emirp because it is prime and its reverse (18365563103) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30136556381 is a prime.

It is a super-3 number, since 3×30136556381³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30136556881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15068278190 + 15068278191.

It is an arithmetic number, because the mean of its divisors is an integer number (15068278191).

Almost surely, 2^30136556381 is an apocalyptic number.

It is an amenable number.

30136556381 is a deficient number, since it is larger than the sum of its proper divisors (1).

30136556381 is an equidigital number, since it uses as much as digits as its factorization.

30136556381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 30136556381 in words is "thirty billion, one hundred thirty-six million, five hundred fifty-six thousand, three hundred eighty-one".