641505456241 has 16 divisors (see below), whose sum is σ = 731795904000. Its totient is φ = 557093230848.

The previous prime is 641505456191. The next prime is 641505456247. The reversal of 641505456241 is 142654505146.

It is a cyclic number.

It is not a de Polignac number, because 641505456241 - 2³³ = 632915521649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641505456247) 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 15 ways as a sum of consecutive naturals, for example, 74811 + ... + 1135168.

It is an arithmetic number, because the mean of its divisors is an integer number (45737244000).

Almost surely, 2^641505456241 is an apocalyptic number.

It is an amenable number.

641505456241 is a deficient number, since it is larger than the sum of its proper divisors (90290447759).

641505456241 is a wasteful number, since it uses less digits than its factorization.

641505456241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212408.

The product of its (nonzero) digits is 576000, while the sum is 43.

The spelling of 641505456241 in words is "six hundred forty-one billion, five hundred five million, four hundred fifty-six thousand, two hundred forty-one".