64895069671 has 4 divisors (see below), whose sum is σ = 64940547672. Its totient is φ = 64849591672.

The previous prime is 64895069627. The next prime is 64895069699. The reversal of 64895069671 is 17696059846.

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 64895069671 - 2²⁹ = 64358198759 is a prime.

It is a super-2 number, since 2×64895069671² (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 (64895069611) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 22736860 + ... + 22739713.

It is an arithmetic number, because the mean of its divisors is an integer number (16235136918).

Almost surely, 2^64895069671 is an apocalyptic number.

64895069671 is a deficient number, since it is larger than the sum of its proper divisors (45478001).

64895069671 is a wasteful number, since it uses less digits than its factorization.

64895069671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45478000.

The product of its (nonzero) digits is 19595520, while the sum is 61.

The spelling of 64895069671 in words is "sixty-four billion, eight hundred ninety-five million, sixty-nine thousand, six hundred seventy-one".