641453694889 has 8 divisors (see below), whose sum is σ = 734278094208. Its totient is φ = 548926334880.

The previous prime is 641453694887. The next prime is 641453694901. The reversal of 641453694889 is 988496354146.

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

It is not a de Polignac number, because 641453694889 - 2¹ = 641453694887 is a prime.

It is a super-2 number, since 2×641453694889² (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 (641453694887) by changing a digit.

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, 74255197 + ... + 74263834.

It is an arithmetic number, because the mean of its divisors is an integer number (91784761776).

Almost surely, 2^641453694889 is an apocalyptic number.

It is an amenable number.

641453694889 is a deficient number, since it is larger than the sum of its proper divisors (92824399319).

641453694889 is a wasteful number, since it uses less digits than its factorization.

641453694889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148519655.

The product of its digits is 179159040, while the sum is 67.

The spelling of 641453694889 in words is "six hundred forty-one billion, four hundred fifty-three million, six hundred ninety-four thousand, eight hundred eighty-nine".