2158706085 has 16 divisors (see below), whose sum is σ = 3463891776. Its totient is φ = 1147989248.

The previous prime is 2158706063. The next prime is 2158706113. The reversal of 2158706085 is 5806078512.

It is a cyclic number.

It is not a de Polignac number, because 2158706085 - 2⁶ = 2158706021 is a prime.

It is a super-2 number, since 2×2158706085² = 9320023922832054450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202164 + ... + 212573.

It is an arithmetic number, because the mean of its divisors is an integer number (216493236).

Almost surely, 2^2158706085 is an apocalyptic number.

It is an amenable number.

2158706085 is a deficient number, since it is larger than the sum of its proper divisors (1305185691).

2158706085 is a wasteful number, since it uses less digits than its factorization.

2158706085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415092.

The product of its (nonzero) digits is 134400, while the sum is 42.

The square root of 2158706085 is about 46461.8777601595. The cubic root of 2158706085 is about 1292.4026462246.

The spelling of 2158706085 in words is "two billion, one hundred fifty-eight million, seven hundred six thousand, eighty-five".