2164056491 has 8 divisors (see below), whose sum is σ = 2174515200. Its totient is φ = 2153620840.

The previous prime is 2164056487. The next prime is 2164056511. The reversal of 2164056491 is 1946504612.

2164056491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2164056491 - 2² = 2164056487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2164056691) 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, 199670 + ... + 210228.

It is an arithmetic number, because the mean of its divisors is an integer number (271814400).

Almost surely, 2^2164056491 is an apocalyptic number.

2164056491 is a deficient number, since it is larger than the sum of its proper divisors (10458709).

2164056491 is a wasteful number, since it uses less digits than its factorization.

2164056491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11529.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 2164056491 is about 46519.4205789367. The cubic root of 2164056491 is about 1293.4695158454.

The spelling of 2164056491 in words is "two billion, one hundred sixty-four million, fifty-six thousand, four hundred ninety-one".