1616564146 has 4 divisors (see below), whose sum is σ = 2424846222. Its totient is φ = 808282072.

The previous prime is 1616564087. The next prime is 1616564179. The reversal of 1616564146 is 6414656161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6414656161 = 10253 ⋅625637.

It can be written as a sum of positive squares in only one way, i.e., 1186458025 + 430106121 = 34445^2 + 20739^2 .

It is a super-2 number, since 2×1616564146² = 5226559276265418632, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1616564099 and 1616564108.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404141035 + ... + 404141038.

Almost surely, 2^1616564146 is an apocalyptic number.

1616564146 is a deficient number, since it is larger than the sum of its proper divisors (808282076).

1616564146 is an equidigital number, since it uses as much as digits as its factorization.

1616564146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808282075.

The product of its digits is 103680, while the sum is 40.

The square root of 1616564146 is about 40206.5187003302. The cubic root of 1616564146 is about 1173.6294013506.

The spelling of 1616564146 in words is "one billion, six hundred sixteen million, five hundred sixty-four thousand, one hundred forty-six".