646004246741 has 4 divisors (see below), whose sum is σ = 738290567712. Its totient is φ = 553717925772.

The previous prime is 646004246737. The next prime is 646004246777. The reversal of 646004246741 is 147642400646.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 646004246741 - 2² = 646004246737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 646004246692 and 646004246701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646004240741) 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 3 ways as a sum of consecutive naturals, for example, 46143160475 + ... + 46143160488.

It is an arithmetic number, because the mean of its divisors is an integer number (184572641928).

Almost surely, 2^646004246741 is an apocalyptic number.

It is an amenable number.

646004246741 is a deficient number, since it is larger than the sum of its proper divisors (92286320971).

646004246741 is an equidigital number, since it uses as much as digits as its factorization.

646004246741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92286320970.

The product of its (nonzero) digits is 774144, while the sum is 44.

The spelling of 646004246741 in words is "six hundred forty-six billion, four million, two hundred forty-six thousand, seven hundred forty-one".