30891377319727 has 2 divisors, whose sum is σ = 30891377319728. Its totient is φ = 30891377319726.

The previous prime is 30891377319713. The next prime is 30891377319809. The reversal of 30891377319727 is 72791377319803.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30891377319727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30891377319527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15445688659863 + 15445688659864.

It is an arithmetic number, because the mean of its divisors is an integer number (15445688659864).

Almost surely, 2^{30891377319727} is an apocalyptic number.

30891377319727 is a deficient number, since it is larger than the sum of its proper divisors (1).

30891377319727 is an equidigital number, since it uses as much as digits as its factorization.

30891377319727 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84015792, while the sum is 67.

The spelling of 30891377319727 in words is "thirty trillion, eight hundred ninety-one billion, three hundred seventy-seven million, three hundred nineteen thousand, seven hundred twenty-seven".