6291159491 has 4 divisors (see below), whose sum is σ = 6377339832. Its totient is φ = 6204979152.

The previous prime is 6291159461. The next prime is 6291159527. The reversal of 6291159491 is 1949511926.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1949511926 = 2 ⋅974755963.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6291159491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6291159461) 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, 43090061 + ... + 43090206.

It is an arithmetic number, because the mean of its divisors is an integer number (1594334958).

Almost surely, 2^6291159491 is an apocalyptic number.

6291159491 is a deficient number, since it is larger than the sum of its proper divisors (86180341).

6291159491 is an equidigital number, since it uses as much as digits as its factorization.

6291159491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86180340.

The product of its digits is 174960, while the sum is 47.

The square root of 6291159491 is about 79316.8298093160. The cubic root of 6291159491 is about 1846.0504483458.

The spelling of 6291159491 in words is "six billion, two hundred ninety-one million, one hundred fifty-nine thousand, four hundred ninety-one".