494191908271 has 4 divisors (see below), whose sum is σ = 496242497344. Its totient is φ = 492141319200.

The previous prime is 494191908263. The next prime is 494191908283. The reversal of 494191908271 is 172809191494.

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

It is a cyclic number.

It is not a de Polignac number, because 494191908271 - 2³ = 494191908263 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 (494191908251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1025294175 + ... + 1025294656.

It is an arithmetic number, because the mean of its divisors is an integer number (124060624336).

Almost surely, 2^494191908271 is an apocalyptic number.

494191908271 is a deficient number, since it is larger than the sum of its proper divisors (2050589073).

494191908271 is a wasteful number, since it uses less digits than its factorization.

494191908271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050589072.

The product of its (nonzero) digits is 1306368, while the sum is 55.

The spelling of 494191908271 in words is "four hundred ninety-four billion, one hundred ninety-one million, nine hundred eight thousand, two hundred seventy-one".