64513471694 has 16 divisors (see below), whose sum is σ = 111628119168. Its totient is φ = 27390231672.

The previous prime is 64513471667. The next prime is 64513471721. The reversal of 64513471694 is 49617431546.

It is an interprime number because it is at equal distance from previous prime (64513471667) and next prime (64513471721).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 21531704 + ... + 21534699.

It is an arithmetic number, because the mean of its divisors is an integer number (6976757448).

Almost surely, 2^64513471694 is an apocalyptic number.

64513471694 is a deficient number, since it is larger than the sum of its proper divisors (47114647474).

64513471694 is a wasteful number, since it uses less digits than its factorization.

64513471694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43066519.

The product of its digits is 2177280, while the sum is 50.

The spelling of 64513471694 in words is "sixty-four billion, five hundred thirteen million, four hundred seventy-one thousand, six hundred ninety-four".