64163713065 has 32 divisors (see below), whose sum is σ = 107606016000. Its totient is φ = 32585969856.

The previous prime is 64163713063. The next prime is 64163713067. The reversal of 64163713065 is 56031736146.

It is an interprime number because it is at equal distance from previous prime (64163713063) and next prime (64163713067).

It is not a de Polignac number, because 64163713065 - 2¹ = 64163713063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64163713063) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 340065 + ... + 493934.

It is an arithmetic number, because the mean of its divisors is an integer number (3362688000).

Almost surely, 2^64163713065 is an apocalyptic number.

It is an amenable number.

64163713065 is a deficient number, since it is larger than the sum of its proper divisors (43442302935).

64163713065 is a wasteful number, since it uses less digits than its factorization.

64163713065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834253.

The product of its (nonzero) digits is 272160, while the sum is 42.

The spelling of 64163713065 in words is "sixty-four billion, one hundred sixty-three million, seven hundred thirteen thousand, sixty-five".