2001857158 has 32 divisors (see below), whose sum is σ = 3479097600. Its totient is φ = 846176544.

The previous prime is 2001857149. The next prime is 2001857189. The reversal of 2001857158 is 8517581002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 343513 + ... + 349291.

It is an arithmetic number, because the mean of its divisors is an integer number (108721800).

Almost surely, 2^2001857158 is an apocalyptic number.

2001857158 is a deficient number, since it is larger than the sum of its proper divisors (1477240442).

2001857158 is a wasteful number, since it uses less digits than its factorization.

2001857158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6124.

The product of its (nonzero) digits is 22400, while the sum is 37.

The square root of 2001857158 is about 44742.1183897231. The cubic root of 2001857158 is about 1260.3109079913.

The spelling of 2001857158 in words is "two billion, one million, eight hundred fifty-seven thousand, one hundred fifty-eight".