64224654421 has 8 divisors (see below), whose sum is σ = 64745152920. Its totient is φ = 63705871872.

The previous prime is 64224654379. The next prime is 64224654437. The reversal of 64224654421 is 12445642246.

It can be written as a sum of positive squares in 4 ways, for example, as 5687271396 + 58537383025 = 75414^2 + 241945^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 64224654421 - 2¹⁵ = 64224621653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64224654491) 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 7 ways as a sum of consecutive naturals, for example, 353776 + ... + 503593.

It is an arithmetic number, because the mean of its divisors is an integer number (8093144115).

Almost surely, 2^64224654421 is an apocalyptic number.

It is an amenable number.

64224654421 is a deficient number, since it is larger than the sum of its proper divisors (520498499).

64224654421 is a wasteful number, since it uses less digits than its factorization.

64224654421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857975.

The product of its digits is 368640, while the sum is 40.

The spelling of 64224654421 in words is "sixty-four billion, two hundred twenty-four million, six hundred fifty-four thousand, four hundred twenty-one".