641145656263 has 32 divisors (see below), whose sum is σ = 744811038720. Its totient is φ = 540561738240.

The previous prime is 641145656243. The next prime is 641145656287. The reversal of 641145656263 is 362656541146.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641145656263 is a prime.

It is a super-2 number, since 2×641145656263² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641145656243) 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 31 ways as a sum of consecutive naturals, for example, 151175823 + ... + 151180063.

It is an arithmetic number, because the mean of its divisors is an integer number (23275344960).

Almost surely, 2^641145656263 is an apocalyptic number.

641145656263 is a deficient number, since it is larger than the sum of its proper divisors (103665382457).

641145656263 is a wasteful number, since it uses less digits than its factorization.

641145656263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5407.

The product of its digits is 3110400, while the sum is 49.

The spelling of 641145656263 in words is "six hundred forty-one billion, one hundred forty-five million, six hundred fifty-six thousand, two hundred sixty-three".