4991394203089 has 4 divisors (see below), whose sum is σ = 5704450517824. Its totient is φ = 4278337888356.

The previous prime is 4991394203069. The next prime is 4991394203101. The reversal of 4991394203089 is 9803024931994.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 4991394203089 - 2⁵ = 4991394203057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4991394203009) 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, 356528157357 + ... + 356528157370.

It is an arithmetic number, because the mean of its divisors is an integer number (1426112629456).

Almost surely, 2^{4991394203089} is an apocalyptic number.

It is an amenable number.

4991394203089 is a deficient number, since it is larger than the sum of its proper divisors (713056314735).

4991394203089 is an equidigital number, since it uses as much as digits as its factorization.

4991394203089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713056314734.

The product of its (nonzero) digits is 15116544, while the sum is 61.

The spelling of 4991394203089 in words is "four trillion, nine hundred ninety-one billion, three hundred ninety-four million, two hundred three thousand, eighty-nine".