291918643214 has 16 divisors (see below), whose sum is σ = 487848566016. Its totient is φ = 129867094200.

The previous prime is 291918643213. The next prime is 291918643217. The reversal of 291918643214 is 412346819192.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (291918643213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141158852 + ... + 141160919.

It is an arithmetic number, because the mean of its divisors is an integer number (30490535376).

Almost surely, 2^291918643214 is an apocalyptic number.

291918643214 is a deficient number, since it is larger than the sum of its proper divisors (195929922802).

291918643214 is a wasteful number, since it uses less digits than its factorization.

291918643214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282319831.

The product of its digits is 746496, while the sum is 50.

The spelling of 291918643214 in words is "two hundred ninety-one billion, nine hundred eighteen million, six hundred forty-three thousand, two hundred fourteen".