491170120815 has 16 divisors (see below), whose sum is σ = 857315120256. Its totient is φ = 238143088800.

The previous prime is 491170120801. The next prime is 491170120871. The reversal of 491170120815 is 518021071194.

It is not a de Polignac number, because 491170120815 - 2⁶ = 491170120751 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1488394141 + ... + 1488394470.

It is an arithmetic number, because the mean of its divisors is an integer number (53582195016).

Almost surely, 2^491170120815 is an apocalyptic number.

491170120815 is a deficient number, since it is larger than the sum of its proper divisors (366144999441).

491170120815 is a wasteful number, since it uses less digits than its factorization.

491170120815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2976788630.

The product of its (nonzero) digits is 20160, while the sum is 39.

The spelling of 491170120815 in words is "four hundred ninety-one billion, one hundred seventy million, one hundred twenty thousand, eight hundred fifteen".