30636366721 has 2 divisors, whose sum is σ = 30636366722. Its totient is φ = 30636366720.

The previous prime is 30636366619. The next prime is 30636366749. The reversal of 30636366721 is 12766363603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28862272321 + 1774094400 = 169889^2 + 42120^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30636366721 is a prime.

It is a super-3 number, since 3×30636366721³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (30636366751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15318183360 + 15318183361.

It is an arithmetic number, because the mean of its divisors is an integer number (15318183361).

Almost surely, 2^30636366721 is an apocalyptic number.

It is an amenable number.

30636366721 is a deficient number, since it is larger than the sum of its proper divisors (1).

30636366721 is an equidigital number, since it uses as much as digits as its factorization.

30636366721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 43.

The spelling of 30636366721 in words is "thirty billion, six hundred thirty-six million, three hundred sixty-six thousand, seven hundred twenty-one".