611643265243 has 4 divisors (see below), whose sum is σ = 611654865840. Its totient is φ = 611631664648.

The previous prime is 611643265223. The next prime is 611643265283. The reversal of 611643265243 is 342562346116.

It is a happy number.

611643265243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 611643265243 - 2⁹ = 611643264731 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 611643265243.

It is not an unprimeable number, because it can be changed into a prime (611643265223) 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, 5720848 + ... + 5826781.

It is an arithmetic number, because the mean of its divisors is an integer number (152913716460).

Almost surely, 2^611643265243 is an apocalyptic number.

611643265243 is a deficient number, since it is larger than the sum of its proper divisors (11600597).

611643265243 is a wasteful number, since it uses less digits than its factorization.

611643265243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11600596.

The product of its digits is 622080, while the sum is 43.

The spelling of 611643265243 in words is "six hundred eleven billion, six hundred forty-three million, two hundred sixty-five thousand, two hundred forty-three".