1216713606 has 32 divisors (see below), whose sum is σ = 2528618496. Its totient is φ = 389880000.

The previous prime is 1216713599. The next prime is 1216713607. The reversal of 1216713606 is 6063176121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216713607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6426 + ... + 49746.

It is an arithmetic number, because the mean of its divisors is an integer number (79019328).

Almost surely, 2^1216713606 is an apocalyptic number.

1216713606 is an abundant number, since it is smaller than the sum of its proper divisors (1311904890).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1216713606 is a wasteful number, since it uses less digits than its factorization.

1216713606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43508.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 1216713606 is about 34881.4220753684. The cubic root of 1216713606 is about 1067.5694111400.

Adding to 1216713606 its reverse (6063176121), we get a palindrome (7279889727).

The spelling of 1216713606 in words is "one billion, two hundred sixteen million, seven hundred thirteen thousand, six hundred six".