1206163644 has 48 divisors (see below), whose sum is σ = 3230293248. Its totient is φ = 343133568.

The previous prime is 1206163639. The next prime is 1206163661. The reversal of 1206163644 is 4463616021.

1206163644 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1206163644² = 2909661472214717472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11242 + ... + 50385.

It is an arithmetic number, because the mean of its divisors is an integer number (67297776).

Almost surely, 2^1206163644 is an apocalyptic number.

1206163644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1206163644 is an abundant number, since it is smaller than the sum of its proper divisors (2024129604).

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

1206163644 is a wasteful number, since it uses less digits than its factorization.

1206163644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61874 (or 61872 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 1206163644 is about 34729.8667431938. The cubic root of 1206163644 is about 1064.4748655313.

Adding to 1206163644 its reverse (4463616021), we get a palindrome (5669779665).

The spelling of 1206163644 in words is "one billion, two hundred six million, one hundred sixty-three thousand, six hundred forty-four".