1212160644 has 72 divisors (see below), whose sum is σ = 3154464768. Its totient is φ = 392273280.

The previous prime is 1212160643. The next prime is 1212160661. The reversal of 1212160644 is 4460612121.

1212160644 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 16 + 0 + 644 = 666.

It is not an unprimeable number, because it can be changed into a prime (1212160643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 212064 + ... + 217704.

Almost surely, 2^1212160644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212160644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1577232384).

1212160644 is an abundant number, since it is smaller than the sum of its proper divisors (1942304124).

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

1212160644 is a wasteful number, since it uses less digits than its factorization.

1212160644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5825 (or 5820 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 1212160644 is about 34816.0974837790. The cubic root of 1212160644 is about 1066.2361260265.

Adding to 1212160644 its reverse (4460612121), we get a palindrome (5672772765).

The spelling of 1212160644 in words is "one billion, two hundred twelve million, one hundred sixty thousand, six hundred forty-four".