64438353529 has 32 divisors (see below), whose sum is σ = 74369548800. Its totient is φ = 55217946240.

The previous prime is 64438353527. The next prime is 64438353541. The reversal of 64438353529 is 92535383446.

It is a cyclic number.

It is not a de Polignac number, because 64438353529 - 2¹ = 64438353527 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64438353527) 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 31 ways as a sum of consecutive naturals, for example, 57075037 + ... + 57076165.

It is an arithmetic number, because the mean of its divisors is an integer number (2324048400).

Almost surely, 2^64438353529 is an apocalyptic number.

It is an amenable number.

64438353529 is a deficient number, since it is larger than the sum of its proper divisors (9931195271).

64438353529 is a wasteful number, since it uses less digits than its factorization.

64438353529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2293.

The product of its digits is 9331200, while the sum is 52.

The spelling of 64438353529 in words is "sixty-four billion, four hundred thirty-eight million, three hundred fifty-three thousand, five hundred twenty-nine".