1561650226 has 24 divisors (see below), whose sum is σ = 2505212100. Its totient is φ = 729921792.

The previous prime is 1561650199. The next prime is 1561650227. The reversal of 1561650226 is 6220561651.

It can be written as a sum of positive squares in 6 ways, for example, as 832380201 + 729270025 = 28851^2 + 27005^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 1561650191 and 1561650200.

It is not an unprimeable number, because it can be changed into a prime (1561650227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77056 + ... + 95188.

Almost surely, 2^1561650226 is an apocalyptic number.

1561650226 is a deficient number, since it is larger than the sum of its proper divisors (943561874).

1561650226 is a wasteful number, since it uses less digits than its factorization.

1561650226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18318 (or 18301 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 1561650226 is about 39517.7204049019. The cubic root of 1561650226 is about 1160.1868075089.

The spelling of 1561650226 in words is "one billion, five hundred sixty-one million, six hundred fifty thousand, two hundred twenty-six".