2005491694079 has 8 divisors (see below), whose sum is σ = 2017242395760. Its totient is φ = 1993767019776.

The previous prime is 2005491694027. The next prime is 2005491694097. The reversal of 2005491694079 is 9704961945002.

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-2005491694079 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 (2005491694879) 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, 6352277 + ... + 6660510.

It is an arithmetic number, because the mean of its divisors is an integer number (252155299470).

Almost surely, 2^{2005491694079} is an apocalyptic number.

2005491694079 is a deficient number, since it is larger than the sum of its proper divisors (11750701681).

2005491694079 is a wasteful number, since it uses less digits than its factorization.

2005491694079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13013689.

The product of its (nonzero) digits is 4898880, while the sum is 56.

The spelling of 2005491694079 in words is "two trillion, five billion, four hundred ninety-one million, six hundred ninety-four thousand, seventy-nine".