641530283885 has 8 divisors (see below), whose sum is σ = 769840920576. Its totient is φ = 513221173840.

The previous prime is 641530283873. The next prime is 641530283909. The reversal of 641530283885 is 588382035146.

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

It is a de Polignac number, because none of the positive numbers 2^k-641530283885 is a prime.

It is a super-2 number, since 2×641530283885² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 992852 + ... + 1506258.

It is an arithmetic number, because the mean of its divisors is an integer number (96230115072).

Almost surely, 2^641530283885 is an apocalyptic number.

It is an amenable number.

641530283885 is a deficient number, since it is larger than the sum of its proper divisors (128310636691).

641530283885 is a wasteful number, since it uses less digits than its factorization.

641530283885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763323.

The product of its (nonzero) digits is 5529600, while the sum is 53.

The spelling of 641530283885 in words is "six hundred forty-one billion, five hundred thirty million, two hundred eighty-three thousand, eight hundred eighty-five".