30690546881 has 2 divisors, whose sum is σ = 30690546882. Its totient is φ = 30690546880.

The previous prime is 30690546877. The next prime is 30690546883. The reversal of 30690546881 is 18864509603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30689433856 + 1113025 = 175184^2 + 1055^2 .

It is a cyclic number.

It is not a de Polignac number, because 30690546881 - 2² = 30690546877 is a prime.

It is a super-2 number, since 2×30690546881² (a number of 22 digits) contains 22 as substring.

Together with 30690546883, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30690546883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15345273440 + 15345273441.

It is an arithmetic number, because the mean of its divisors is an integer number (15345273441).

Almost surely, 2^30690546881 is an apocalyptic number.

It is an amenable number.

30690546881 is a deficient number, since it is larger than the sum of its proper divisors (1).

30690546881 is an equidigital number, since it uses as much as digits as its factorization.

30690546881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1244160, while the sum is 50.

The spelling of 30690546881 in words is "thirty billion, six hundred ninety million, five hundred forty-six thousand, eight hundred eighty-one".