64220450423 has 8 divisors (see below), whose sum is σ = 66336706560. Its totient is φ = 62106983640.

The previous prime is 64220450419. The next prime is 64220450443. The reversal of 64220450423 is 32405402246.

It is a happy number.

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 64220450423 - 2² = 64220450419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64220450423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64220450443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 650483 + ... + 742676.

It is an arithmetic number, because the mean of its divisors is an integer number (8292088320).

Almost surely, 2^64220450423 is an apocalyptic number.

64220450423 is a deficient number, since it is larger than the sum of its proper divisors (2116256137).

64220450423 is a wasteful number, since it uses less digits than its factorization.

64220450423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1394677.

The product of its (nonzero) digits is 46080, while the sum is 32.

Adding to 64220450423 its reverse (32405402246), we get a palindrome (96625852669).

The spelling of 64220450423 in words is "sixty-four billion, two hundred twenty million, four hundred fifty thousand, four hundred twenty-three".