64226136684581 has 8 divisors (see below), whose sum is σ = 67609087410720. Its totient is φ = 60843448732752.

The previous prime is 64226136684559. The next prime is 64226136684617. The reversal of 64226136684581 is 18548663162246.

64226136684581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-64226136684581 is a prime.

It is a super-2 number, since 2×64226136684581² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64226136684551) 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, 65191775 + ... + 66169628.

It is an arithmetic number, because the mean of its divisors is an integer number (8451135926340).

Almost surely, 2^{64226136684581} is an apocalyptic number.

It is an amenable number.

64226136684581 is a deficient number, since it is larger than the sum of its proper divisors (3382950726139).

64226136684581 is a wasteful number, since it uses less digits than its factorization.

64226136684581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131387155.

The product of its digits is 79626240, while the sum is 62.

The spelling of 64226136684581 in words is "sixty-four trillion, two hundred twenty-six billion, one hundred thirty-six million, six hundred eighty-four thousand, five hundred eighty-one".