1656213044 has 24 divisors (see below), whose sum is σ = 2914325568. Its totient is φ = 823560320.

The previous prime is 1656213043. The next prime is 1656213047. The reversal of 1656213044 is 4403126561.

It is a self number, because there is not a number n which added to its sum of digits gives 1656213044.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1656213043) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 925919 + ... + 927705.

It is an arithmetic number, because the mean of its divisors is an integer number (121430232).

Almost surely, 2^1656213044 is an apocalyptic number.

It is an amenable number.

1656213044 is a deficient number, since it is larger than the sum of its proper divisors (1258112524).

1656213044 is a wasteful number, since it uses less digits than its factorization.

1656213044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2935 (or 2933 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 1656213044 is about 40696.5974499097. The cubic root of 1656213044 is about 1183.1470727841.

The spelling of 1656213044 in words is "one billion, six hundred fifty-six million, two hundred thirteen thousand, forty-four".