2001671855 has 16 divisors (see below), whose sum is σ = 2445163200. Its totient is φ = 1572806400.

The previous prime is 2001671849. The next prime is 2001671879. The reversal of 2001671855 is 5581761002.

It is not a de Polignac number, because 2001671855 - 2⁴ = 2001671839 is a prime.

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, 52301 + ... + 82089.

It is an arithmetic number, because the mean of its divisors is an integer number (152822700).

Almost surely, 2^2001671855 is an apocalyptic number.

2001671855 is a deficient number, since it is larger than the sum of its proper divisors (443491345).

2001671855 is a wasteful number, since it uses less digits than its factorization.

2001671855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30034.

The product of its (nonzero) digits is 16800, while the sum is 35.

The square root of 2001671855 is about 44740.0475525004. The cubic root of 2001671855 is about 1260.2720196691.

The spelling of 2001671855 in words is "two billion, one million, six hundred seventy-one thousand, eight hundred fifty-five".