491980432127 has 4 divisors (see below), whose sum is σ = 491986747536. Its totient is φ = 491974116720.

The previous prime is 491980432121. The next prime is 491980432147. The reversal of 491980432127 is 721234089194.

It is a happy number.

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 491980432127 - 2¹⁴ = 491980415743 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 (491980432121) 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, 3039374 + ... + 3197147.

It is an arithmetic number, because the mean of its divisors is an integer number (122996686884).

Almost surely, 2^491980432127 is an apocalyptic number.

491980432127 is a deficient number, since it is larger than the sum of its proper divisors (6315409).

491980432127 is an equidigital number, since it uses as much as digits as its factorization.

491980432127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6315408.

The product of its (nonzero) digits is 870912, while the sum is 50.

The spelling of 491980432127 in words is "four hundred ninety-one billion, nine hundred eighty million, four hundred thirty-two thousand, one hundred twenty-seven".