2164125491 has 8 divisors (see below), whose sum is σ = 2361216000. Its totient is φ = 1967093640.

The previous prime is 2164125473. The next prime is 2164125497. The reversal of 2164125491 is 1945214612.

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 2164125491 - 2¹⁰ = 2164124467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2164125497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104930 + ... + 123848.

It is an arithmetic number, because the mean of its divisors is an integer number (295152000).

Almost surely, 2^2164125491 is an apocalyptic number.

2164125491 is a deficient number, since it is larger than the sum of its proper divisors (197090509).

2164125491 is a wasteful number, since it uses less digits than its factorization.

2164125491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29329.

The product of its digits is 17280, while the sum is 35.

The square root of 2164125491 is about 46520.1621987714. The cubic root of 2164125491 is about 1293.4832629369.

The spelling of 2164125491 in words is "two billion, one hundred sixty-four million, one hundred twenty-five thousand, four hundred ninety-one".