1220161606 has 8 divisors (see below), whose sum is σ = 1832215320. Its totient is φ = 609423168.

The previous prime is 1220161559. The next prime is 1220161637. The reversal of 1220161606 is 6061610221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 326496 + ... + 330211.

It is an arithmetic number, because the mean of its divisors is an integer number (229026915).

Almost surely, 2^1220161606 is an apocalyptic number.

1220161606 is a deficient number, since it is larger than the sum of its proper divisors (612053714).

1220161606 is an equidigital number, since it uses as much as digits as its factorization.

1220161606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657638.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1220161606 is about 34930.8116997015. The cubic root of 1220161606 is about 1068.5769086165.

Adding to 1220161606 its reverse (6061610221), we get a palindrome (7281771827).

The spelling of 1220161606 in words is "one billion, two hundred twenty million, one hundred sixty-one thousand, six hundred six".