1656691922 has 18 divisors (see below), whose sum is σ = 2641375503. Its totient is φ = 779159232.

The previous prime is 1656691889. The next prime is 1656691931. The reversal of 1656691922 is 2291966561.

It can be written as a sum of positive squares in 5 ways, for example, as 1112822881 + 543869041 = 33359^2 + 23321^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=28781.

It is a Duffinian number.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 977708 + ... + 979400.

Almost surely, 2^1656691922 is an apocalyptic number.

1656691922 is a deficient number, since it is larger than the sum of its proper divisors (984683581).

1656691922 is an frugal number, since it uses more digits than its factorization.

1656691922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3422 (or 1712 counting only the distinct ones).

The product of its digits is 349920, while the sum is 47.

The square root of 1656691922 is about 40702.4805386600. The cubic root of 1656691922 is about 1183.2610936438.

The spelling of 1656691922 in words is "one billion, six hundred fifty-six million, six hundred ninety-one thousand, nine hundred twenty-two".