64165451071 has 4 divisors (see below), whose sum is σ = 64201931200. Its totient is φ = 64128970944.

The previous prime is 64165451047. The next prime is 64165451089. The reversal of 64165451071 is 17015456146.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64165451071 - 2¹³ = 64165442879 is a prime.

It is a super-2 number, since 2×64165451071² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64165451671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18237426 + ... + 18240943.

It is an arithmetic number, because the mean of its divisors is an integer number (16050482800).

Almost surely, 2^64165451071 is an apocalyptic number.

64165451071 is a deficient number, since it is larger than the sum of its proper divisors (36480129).

64165451071 is a wasteful number, since it uses less digits than its factorization.

64165451071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36480128.

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 64165451071 in words is "sixty-four billion, one hundred sixty-five million, four hundred fifty-one thousand, seventy-one".