64006220401 has 4 divisors (see below), whose sum is σ = 64435792500. Its totient is φ = 63576648304.

The previous prime is 64006220357. The next prime is 64006220423. The reversal of 64006220401 is 10402260046.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40336705600 + 23669514801 = 200840^2 + 153849^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64006220401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64006220491) 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 3 ways as a sum of consecutive naturals, for example, 214785826 + ... + 214786123.

It is an arithmetic number, because the mean of its divisors is an integer number (16108948125).

Almost surely, 2^64006220401 is an apocalyptic number.

It is an amenable number.

64006220401 is a deficient number, since it is larger than the sum of its proper divisors (429572099).

64006220401 is a wasteful number, since it uses less digits than its factorization.

64006220401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429572098.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 64006220401 its reverse (10402260046), we get a palindrome (74408480447).

The spelling of 64006220401 in words is "sixty-four billion, six million, two hundred twenty thousand, four hundred one".