611643840499 has 8 divisors (see below), whose sum is σ = 611921970000. Its totient is φ = 611365773792.

The previous prime is 611643840473. The next prime is 611643840503. The reversal of 611643840499 is 994048346116.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 611643840499 - 2⁷ = 611643840371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (611643840449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34924357 + ... + 34941865.

It is an arithmetic number, because the mean of its divisors is an integer number (76490246250).

Almost surely, 2^611643840499 is an apocalyptic number.

611643840499 is a deficient number, since it is larger than the sum of its proper divisors (278129501).

611643840499 is a wasteful number, since it uses less digits than its factorization.

611643840499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31397.

The product of its (nonzero) digits is 4478976, while the sum is 55.

The spelling of 611643840499 in words is "six hundred eleven billion, six hundred forty-three million, eight hundred forty thousand, four hundred ninety-nine".