64221606245 has 8 divisors (see below), whose sum is σ = 77071730040. Its totient is φ = 51373416640.

The previous prime is 64221606221. The next prime is 64221606247. The reversal of 64221606245 is 54260612246.

It can be written as a sum of positive squares in 4 ways, for example, as 923521 + 64220682724 = 961^2 + 253418^2 .

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

It is not a de Polignac number, because 64221606245 - 2²² = 64217411941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64221606199 and 64221606208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64221606247) 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, 409466 + ... + 544155.

It is an arithmetic number, because the mean of its divisors is an integer number (9633966255).

Almost surely, 2^64221606245 is an apocalyptic number.

It is an amenable number.

64221606245 is a deficient number, since it is larger than the sum of its proper divisors (12850123795).

64221606245 is a wasteful number, since it uses less digits than its factorization.

64221606245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967095.

The product of its (nonzero) digits is 138240, while the sum is 38.

The spelling of 64221606245 in words is "sixty-four billion, two hundred twenty-one million, six hundred six thousand, two hundred forty-five".