4999999999991 has 8 divisors (see below), whose sum is σ = 5008592796000. Its totient is φ = 4991408023680.

The previous prime is 4999999999937. The next prime is 5000000000053. The reversal of 4999999999991 is 1999999999994.

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

It is a cyclic number.

It is not a de Polignac number, because 4999999999991 - 2¹⁸ = 4999999737847 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 (4999999990991) 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, 12702011 + ... + 13089731.

It is an arithmetic number, because the mean of its divisors is an integer number (626074099500).

Almost surely, 2^{4999999999991} is an apocalyptic number.

4999999999991 is a deficient number, since it is larger than the sum of its proper divisors (8592796009).

4999999999991 is a wasteful number, since it uses less digits than its factorization.

4999999999991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409849.

The product of its digits is 125524238436, while the sum is 104.

The spelling of 4999999999991 in words is "four trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-one".