2158658867 has 16 divisors (see below), whose sum is σ = 2294003712. Its totient is φ = 2028015360.

The previous prime is 2158658857. The next prime is 2158658869. The reversal of 2158658867 is 7688568512.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2158658867 - 2⁴ = 2158658851 is a prime.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2158658869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217763 + ... + 227459.

It is an arithmetic number, because the mean of its divisors is an integer number (143375232).

Almost surely, 2^2158658867 is an apocalyptic number.

2158658867 is a deficient number, since it is larger than the sum of its proper divisors (135344845).

2158658867 is a wasteful number, since it uses less digits than its factorization.

2158658867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9938.

The product of its digits is 6451200, while the sum is 56.

The square root of 2158658867 is about 46461.3696203631. The cubic root of 2158658867 is about 1292.3932231241.

The spelling of 2158658867 in words is "two billion, one hundred fifty-eight million, six hundred fifty-eight thousand, eight hundred sixty-seven".