641656308367 has 8 divisors (see below), whose sum is σ = 643988729232. Its totient is φ = 639324235200.

The previous prime is 641656308343. The next prime is 641656308389. The reversal of 641656308367 is 763803656146.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641656308367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641656308967) 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 7 ways as a sum of consecutive naturals, for example, 3950208 + ... + 4109434.

It is an arithmetic number, because the mean of its divisors is an integer number (80498591154).

Almost surely, 2^641656308367 is an apocalyptic number.

641656308367 is a deficient number, since it is larger than the sum of its proper divisors (2332420865).

641656308367 is a wasteful number, since it uses less digits than its factorization.

641656308367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173849.

The product of its (nonzero) digits is 13063680, while the sum is 55.

The spelling of 641656308367 in words is "six hundred forty-one billion, six hundred fifty-six million, three hundred eight thousand, three hundred sixty-seven".