30643112761 has 2 divisors, whose sum is σ = 30643112762. Its totient is φ = 30643112760.

The previous prime is 30643112743. The next prime is 30643112777. The reversal of 30643112761 is 16721134603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24341928361 + 6301184400 = 156019^2 + 79380^2 .

It is a cyclic number.

It is not a de Polignac number, because 30643112761 - 2⁵ = 30643112729 is a prime.

It is a super-2 number, since 2×30643112761² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30643112261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15321556380 + 15321556381.

It is an arithmetic number, because the mean of its divisors is an integer number (15321556381).

Almost surely, 2^30643112761 is an apocalyptic number.

It is an amenable number.

30643112761 is a deficient number, since it is larger than the sum of its proper divisors (1).

30643112761 is an equidigital number, since it uses as much as digits as its factorization.

30643112761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 34.

The spelling of 30643112761 in words is "thirty billion, six hundred forty-three million, one hundred twelve thousand, seven hundred sixty-one".