491326813271 has 16 divisors (see below), whose sum is σ = 579656460288. Its totient is φ = 407533442400.

The previous prime is 491326813261. The next prime is 491326813277. The reversal of 491326813271 is 172318623194.

It is not a de Polignac number, because 491326813271 - 2⁶ = 491326813207 is a prime.

It is a super-2 number, since 2×491326813271² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491326813277) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6667136 + ... + 6740426.

It is an arithmetic number, because the mean of its divisors is an integer number (36228528768).

Almost surely, 2^491326813271 is an apocalyptic number.

491326813271 is a deficient number, since it is larger than the sum of its proper divisors (88329647017).

491326813271 is a wasteful number, since it uses less digits than its factorization.

491326813271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104222.

The product of its digits is 435456, while the sum is 47.

The spelling of 491326813271 in words is "four hundred ninety-one billion, three hundred twenty-six million, eight hundred thirteen thousand, two hundred seventy-one".