1656630146 has 4 divisors (see below), whose sum is σ = 2484945222. Its totient is φ = 828315072.

The previous prime is 1656630109. The next prime is 1656630163. The reversal of 1656630146 is 6410366561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6410366561 = 1301 ⋅4927261.

It can be written as a sum of positive squares in only one way, i.e., 912704521 + 743925625 = 30211^2 + 27275^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 414157535 + ... + 414157538.

Almost surely, 2^1656630146 is an apocalyptic number.

1656630146 is a deficient number, since it is larger than the sum of its proper divisors (828315076).

1656630146 is an equidigital number, since it uses as much as digits as its factorization.

1656630146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828315075.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 1656630146 is about 40701.7216589176. The cubic root of 1656630146 is about 1183.2463860117.

The spelling of 1656630146 in words is "one billion, six hundred fifty-six million, six hundred thirty thousand, one hundred forty-six".