491152318199 has 4 divisors (see below), whose sum is σ = 491344854000. Its totient is φ = 490959782400.

The previous prime is 491152318183. The next prime is 491152318211. The reversal of 491152318199 is 991813251194.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 991813251194 = 2 ⋅495906625597.

It is a cyclic number.

It is not a de Polignac number, because 491152318199 - 2⁴ = 491152318183 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 491152318199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491152318109) 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, 96264074 + ... + 96269175.

It is an arithmetic number, because the mean of its divisors is an integer number (122836213500).

Almost surely, 2^491152318199 is an apocalyptic number.

491152318199 is a deficient number, since it is larger than the sum of its proper divisors (192535801).

491152318199 is a wasteful number, since it uses less digits than its factorization.

491152318199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192535800.

The product of its digits is 699840, while the sum is 53.

The spelling of 491152318199 in words is "four hundred ninety-one billion, one hundred fifty-two million, three hundred eighteen thousand, one hundred ninety-nine".