64165384765 has 16 divisors (see below), whose sum is σ = 77447658816. Its totient is φ = 51033673600.

The previous prime is 64165384763. The next prime is 64165384769. The reversal of 64165384765 is 56748356146.

It is a happy number.

64165384765 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64165384765 - 2¹ = 64165384763 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64165384763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 570870 + ... + 673960.

It is an arithmetic number, because the mean of its divisors is an integer number (4840478676).

Almost surely, 2^64165384765 is an apocalyptic number.

It is an amenable number.

64165384765 is a deficient number, since it is larger than the sum of its proper divisors (13282274051).

64165384765 is a wasteful number, since it uses less digits than its factorization.

64165384765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103820.

The product of its digits is 14515200, while the sum is 55.

The spelling of 64165384765 in words is "sixty-four billion, one hundred sixty-five million, three hundred eighty-four thousand, seven hundred sixty-five".