641418831185 has 16 divisors (see below), whose sum is σ = 839707126272. Its totient is φ = 466468886400.

The previous prime is 641418831181. The next prime is 641418831203. The reversal of 641418831185 is 581138814146.

It is not a de Polignac number, because 641418831185 - 2² = 641418831181 is a prime.

It is a super-2 number, since 2×641418831185² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641418831181) 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, 1359605 + ... + 1769565.

It is an arithmetic number, because the mean of its divisors is an integer number (52481695392).

Almost surely, 2^641418831185 is an apocalyptic number.

It is an amenable number.

641418831185 is a deficient number, since it is larger than the sum of its proper divisors (198288295087).

641418831185 is a wasteful number, since it uses less digits than its factorization.

641418831185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438424.

The product of its digits is 737280, while the sum is 50.

The spelling of 641418831185 in words is "six hundred forty-one billion, four hundred eighteen million, eight hundred thirty-one thousand, one hundred eighty-five".