611243201243 has 4 divisors (see below), whose sum is σ = 632320553040. Its totient is φ = 590165849448.

The previous prime is 611243201237. The next prime is 611243201269. The reversal of 611243201243 is 342102342116.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-611243201243 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 21077351767 = 611243201243 / (6 + 1 + 1 + 2 + 4 + 3 + 2 + 0 + 1 + 2 + 4 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (611243201213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10538675855 + ... + 10538675912.

It is an arithmetic number, because the mean of its divisors is an integer number (158080138260).

Almost surely, 2^611243201243 is an apocalyptic number.

611243201243 is a deficient number, since it is larger than the sum of its proper divisors (21077351797).

611243201243 is a wasteful number, since it uses less digits than its factorization.

611243201243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21077351796.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 611243201243 its reverse (342102342116), we get a palindrome (953345543359).

The spelling of 611243201243 in words is "six hundred eleven billion, two hundred forty-three million, two hundred one thousand, two hundred forty-three".