2146581646 has 16 divisors (see below), whose sum is σ = 3513375360. Its totient is φ = 975500280.

The previous prime is 2146581641. The next prime is 2146581683. The reversal of 2146581646 is 6461856412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2146581641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129625 + ... + 145243.

It is an arithmetic number, because the mean of its divisors is an integer number (219585960).

Almost surely, 2^2146581646 is an apocalyptic number.

2146581646 is a deficient number, since it is larger than the sum of its proper divisors (1366793714).

2146581646 is a wasteful number, since it uses less digits than its factorization.

2146581646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21879.

The product of its digits is 276480, while the sum is 43.

The square root of 2146581646 is about 46331.2167550130. The cubic root of 2146581646 is about 1289.9784957255.

The spelling of 2146581646 in words is "two billion, one hundred forty-six million, five hundred eighty-one thousand, six hundred forty-six".