1209709240352 has 18 divisors (see below), whose sum is σ = 2381627316159. Its totient is φ = 604851509280.

The previous prime is 1209709240349. The next prime is 1209709240357. The reversal of 1209709240352 is 2530429079021.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 604854620176 + 604854620176 = 777724^2 + 777724^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=777724.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1209709240357) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6124577 + ... + 6319007.

Almost surely, 2^{1209709240352} is an apocalyptic number.

It is an amenable number.

1209709240352 is a deficient number, since it is larger than the sum of its proper divisors (1171918075807).

1209709240352 is an frugal number, since it uses more digits than its factorization.

1209709240352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388872 (or 194433 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 44.

The spelling of 1209709240352 in words is "one trillion, two hundred nine billion, seven hundred nine million, two hundred forty thousand, three hundred fifty-two".