2161461646 has 16 divisors (see below), whose sum is σ = 3305304000. Its totient is φ = 1059877728.

The previous prime is 2161461629. The next prime is 2161461661. The reversal of 2161461646 is 6461641612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22365 + ... + 69448.

It is an arithmetic number, because the mean of its divisors is an integer number (206581500).

Almost surely, 2^2161461646 is an apocalyptic number.

2161461646 is a deficient number, since it is larger than the sum of its proper divisors (1143842354).

2161461646 is a wasteful number, since it uses less digits than its factorization.

2161461646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92043.

The product of its digits is 41472, while the sum is 37.

The square root of 2161461646 is about 46491.5223024585. The cubic root of 2161461646 is about 1292.9523242795.

The spelling of 2161461646 in words is "two billion, one hundred sixty-one million, four hundred sixty-one thousand, six hundred forty-six".