30061968491 has 4 divisors (see below), whose sum is σ = 30062877984. Its totient is φ = 30061059000.

The previous prime is 30061968481. The next prime is 30061968523. The reversal of 30061968491 is 19486916003.

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-30061968491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30061968401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 403220 + ... + 471921.

It is an arithmetic number, because the mean of its divisors is an integer number (7515719496).

Almost surely, 2^30061968491 is an apocalyptic number.

30061968491 is a deficient number, since it is larger than the sum of its proper divisors (909493).

30061968491 is an equidigital number, since it uses as much as digits as its factorization.

30061968491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909492.

The product of its (nonzero) digits is 279936, while the sum is 47.

The spelling of 30061968491 in words is "thirty billion, sixty-one million, nine hundred sixty-eight thousand, four hundred ninety-one".