64334062065 has 128 divisors (see below), whose sum is σ = 130021420032. Its totient is φ = 26435911680.

The previous prime is 64334062063. The next prime is 64334062069. The reversal of 64334062065 is 56026043346.

It is not a de Polignac number, because 64334062065 - 2¹ = 64334062063 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (64334062063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 55796529 + ... + 55797681.

It is an arithmetic number, because the mean of its divisors is an integer number (1015792344).

Almost surely, 2^64334062065 is an apocalyptic number.

64334062065 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64334062065 is an abundant number, since it is smaller than the sum of its proper divisors (65687357967).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64334062065 is a wasteful number, since it uses less digits than its factorization.

64334062065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2219.

The product of its (nonzero) digits is 311040, while the sum is 39.

The spelling of 64334062065 in words is "sixty-four billion, three hundred thirty-four million, sixty-two thousand, sixty-five".