30980885887 has 4 divisors (see below), whose sum is σ = 35406726736. Its totient is φ = 26555045040.

The previous prime is 30980885857. The next prime is 30980885891. The reversal of 30980885887 is 78858808903.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30980885887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30980885807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2212920414 + ... + 2212920427.

It is an arithmetic number, because the mean of its divisors is an integer number (8851681684).

Almost surely, 2^30980885887 is an apocalyptic number.

30980885887 is a deficient number, since it is larger than the sum of its proper divisors (4425840849).

30980885887 is an equidigital number, since it uses as much as digits as its factorization.

30980885887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4425840848.

The product of its (nonzero) digits is 30965760, while the sum is 64.

The spelling of 30980885887 in words is "thirty billion, nine hundred eighty million, eight hundred eighty-five thousand, eight hundred eighty-seven".