2001672156 has 48 divisors (see below), whose sum is σ = 5156581248. Its totient is φ = 599256000.

The previous prime is 2001672151. The next prime is 2001672163. The reversal of 2001672156 is 6512761002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001672151) 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, 80395 + ... + 102306.

It is an arithmetic number, because the mean of its divisors is an integer number (107428776).

Almost surely, 2^2001672156 is an apocalyptic number.

It is an amenable number.

2001672156 is an abundant number, since it is smaller than the sum of its proper divisors (3154909092).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001672156 is a wasteful number, since it uses less digits than its factorization.

2001672156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182802 (or 182800 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 2001672156 is about 44740.0509163769. The cubic root of 2001672156 is about 1260.2720828399.

The spelling of 2001672156 in words is "two billion, one million, six hundred seventy-two thousand, one hundred fifty-six".