491155643127 has 8 divisors (see below), whose sum is σ = 662764241664. Its totient is φ = 323492070008.

The previous prime is 491155643101. The next prime is 491155643129. The reversal of 491155643127 is 721346551194.

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 491155643127 - 2⁶ = 491155643063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491155643129) 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, 986256063 + ... + 986256560.

It is an arithmetic number, because the mean of its divisors is an integer number (82845530208).

Almost surely, 2^491155643127 is an apocalyptic number.

491155643127 is a deficient number, since it is larger than the sum of its proper divisors (171608598537).

491155643127 is a wasteful number, since it uses less digits than its factorization.

491155643127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1972512709.

The product of its digits is 907200, while the sum is 48.

The spelling of 491155643127 in words is "four hundred ninety-one billion, one hundred fifty-five million, six hundred forty-three thousand, one hundred twenty-seven".