64235213573 has 4 divisors (see below), whose sum is σ = 64249438860. Its totient is φ = 64220988288.

The previous prime is 64235213489. The next prime is 64235213591. The reversal of 64235213573 is 37531253246.

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 19247955169 + 44987258404 = 138737^2 + 212102^2 .

It is a cyclic number.

It is not a de Polignac number, because 64235213573 - 2¹⁰ = 64235212549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64235213573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64235413573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7105868 + ... + 7114901.

It is an arithmetic number, because the mean of its divisors is an integer number (16062359715).

Almost surely, 2^64235213573 is an apocalyptic number.

It is an amenable number.

64235213573 is a deficient number, since it is larger than the sum of its proper divisors (14225287).

64235213573 is a wasteful number, since it uses less digits than its factorization.

64235213573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14225286.

The product of its digits is 453600, while the sum is 41.

The spelling of 64235213573 in words is "sixty-four billion, two hundred thirty-five million, two hundred thirteen thousand, five hundred seventy-three".