491211651214 has 4 divisors (see below), whose sum is σ = 736817476824. Its totient is φ = 245605825606.

The previous prime is 491211651209. The next prime is 491211651253. The reversal of 491211651214 is 412156112194.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 412156112194 = 2 ⋅206078056097.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122802912802 + ... + 122802912805.

It is an arithmetic number, because the mean of its divisors is an integer number (184204369206).

Almost surely, 2^491211651214 is an apocalyptic number.

491211651214 is a deficient number, since it is larger than the sum of its proper divisors (245605825610).

491211651214 is a wasteful number, since it uses less digits than its factorization.

491211651214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245605825609.

The product of its digits is 17280, while the sum is 37.

The spelling of 491211651214 in words is "four hundred ninety-one billion, two hundred eleven million, six hundred fifty-one thousand, two hundred fourteen".