1206643489360 has 40 divisors (see below), whose sum is σ = 2815574128776. Its totient is φ = 480914941440.

The previous prime is 1206643489339. The next prime is 1206643489367. The reversal of 1206643489360 is 639843466021.

It can be written as a sum of positive squares in 4 ways, for example, as 9483643456 + 1197159845904 = 97384^2 + 1094148^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 1206643489298 and 1206643489307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206643489367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27203551 + ... + 27247870.

Almost surely, 2^{1206643489360} is an apocalyptic number.

1206643489360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1206643489360 is an abundant number, since it is smaller than the sum of its proper divisors (1608930639416).

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

1206643489360 is a wasteful number, since it uses less digits than its factorization.

1206643489360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54451711 (or 54451705 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 52.

The spelling of 1206643489360 in words is "one trillion, two hundred six billion, six hundred forty-three million, four hundred eighty-nine thousand, three hundred sixty".