64421341506 has 24 divisors (see below), whose sum is σ = 143351995644. Its totient is φ = 20893407840.

The previous prime is 64421341463. The next prime is 64421341531. The reversal of 64421341506 is 60514312446.

64421341506 is a `hidden beast` number, since 64 + 42 + 13 + 41 + 506 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 52168844025 + 12252497481 = 228405^2 + 110691^2 .

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 11 ways as a sum of consecutive naturals, for example, 48363705 + ... + 48365036.

Almost surely, 2^64421341506 is an apocalyptic number.

64421341506 is an abundant number, since it is smaller than the sum of its proper divisors (78930654138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64421341506 is a wasteful number, since it uses less digits than its factorization.

64421341506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96728786 (or 96728783 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 64421341506 in words is "sixty-four billion, four hundred twenty-one million, three hundred forty-one thousand, five hundred six".