30771438100991 has 8 divisors (see below), whose sum is σ = 35167417205760. Its totient is φ = 26375473840248.

The previous prime is 30771438100973. The next prime is 30771438100993. The reversal of 30771438100991 is 19900183417703.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30771438100991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30771438100993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1156790 + ... + 7929756.

It is an arithmetic number, because the mean of its divisors is an integer number (4395927150720).

Almost surely, 2^{30771438100991} is an apocalyptic number.

30771438100991 is a deficient number, since it is larger than the sum of its proper divisors (4395979104769).

30771438100991 is an equidigital number, since it uses as much as digits as its factorization.

30771438100991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7422013.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The spelling of 30771438100991 in words is "thirty trillion, seven hundred seventy-one billion, four hundred thirty-eight million, one hundred thousand, nine hundred ninety-one".