64696319999 has 4 divisors (see below), whose sum is σ = 65917005336. Its totient is φ = 63475634664.

The previous prime is 64696319969. The next prime is 64696320043. The reversal of 64696319999 is 99991369646.

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 64696319999 - 2¹⁶ = 64696254463 is a prime.

It is a super-2 number, since 2×64696319999² (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 (64696319959) 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, 610342589 + ... + 610342694.

It is an arithmetic number, because the mean of its divisors is an integer number (16479251334).

Almost surely, 2^64696319999 is an apocalyptic number.

64696319999 is a deficient number, since it is larger than the sum of its proper divisors (1220685337).

64696319999 is a wasteful number, since it uses less digits than its factorization.

64696319999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220685336.

The product of its digits is 153055008, while the sum is 71.

The spelling of 64696319999 in words is "sixty-four billion, six hundred ninety-six million, three hundred nineteen thousand, nine hundred ninety-nine".