491715734815 has 8 divisors (see below), whose sum is σ = 590976551088. Its totient is φ = 392760808320.

The previous prime is 491715734791. The next prime is 491715734831. The reversal of 491715734815 is 518437517194.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 491715734815 - 2¹⁹ = 491715210527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76468906 + ... + 76475335.

It is an arithmetic number, because the mean of its divisors is an integer number (73872068886).

Almost surely, 2^491715734815 is an apocalyptic number.

491715734815 is a deficient number, since it is larger than the sum of its proper divisors (99260816273).

491715734815 is a wasteful number, since it uses less digits than its factorization.

491715734815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152944889.

The product of its digits is 4233600, while the sum is 55.

The spelling of 491715734815 in words is "four hundred ninety-one billion, seven hundred fifteen million, seven hundred thirty-four thousand, eight hundred fifteen".