2158787873 has 8 divisors (see below), whose sum is σ = 2388211776. Its totient is φ = 1934892400.

The previous prime is 2158787861. The next prime is 2158787881. The reversal of 2158787873 is 3787878512.

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 2158787873 - 2¹⁶ = 2158722337 is a prime.

It is a super-2 number, since 2×2158787873² = 9320730161223728258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2158787893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1381286 + ... + 1382847.

It is an arithmetic number, because the mean of its divisors is an integer number (298526472).

Almost surely, 2^2158787873 is an apocalyptic number.

It is an amenable number.

2158787873 is a deficient number, since it is larger than the sum of its proper divisors (229423903).

2158787873 is a wasteful number, since it uses less digits than its factorization.

2158787873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2764215.

The product of its digits is 5268480, while the sum is 56.

The square root of 2158787873 is about 46462.7579142694. The cubic root of 2158787873 is about 1292.4189679915.

The spelling of 2158787873 in words is "two billion, one hundred fifty-eight million, seven hundred eighty-seven thousand, eight hundred seventy-three".