4156391291 has 8 divisors (see below), whose sum is σ = 4537431360. Its totient is φ = 3784110912.

The previous prime is 4156391287. The next prime is 4156391329. The reversal of 4156391291 is 1921936514.

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

It is a cyclic number.

It is not a de Polignac number, because 4156391291 - 2² = 4156391287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4156391891) 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, 2188931 + ... + 2190828.

It is an arithmetic number, because the mean of its divisors is an integer number (567178920).

Almost surely, 2^4156391291 is an apocalyptic number.

4156391291 is a deficient number, since it is larger than the sum of its proper divisors (381040069).

4156391291 is a wasteful number, since it uses less digits than its factorization.

4156391291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4379845.

The product of its digits is 58320, while the sum is 41.

The square root of 4156391291 is about 64470.0805878200. The cubic root of 4156391291 is about 1607.8251166776.

The spelling of 4156391291 in words is "four billion, one hundred fifty-six million, three hundred ninety-one thousand, two hundred ninety-one".