64520035855 has 16 divisors (see below), whose sum is σ = 84531405600. Its totient is φ = 46885432960.

The previous prime is 64520035837. The next prime is 64520035901. The reversal of 64520035855 is 55853002546.

It is not a de Polignac number, because 64520035855 - 2¹⁷ = 64519904783 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 409660 + ... + 544849.

It is an arithmetic number, because the mean of its divisors is an integer number (5283212850).

Almost surely, 2^64520035855 is an apocalyptic number.

64520035855 is a deficient number, since it is larger than the sum of its proper divisors (20011369745).

64520035855 is a wasteful number, since it uses less digits than its factorization.

64520035855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955754.

The product of its (nonzero) digits is 720000, while the sum is 43.

The spelling of 64520035855 in words is "sixty-four billion, five hundred twenty million, thirty-five thousand, eight hundred fifty-five".