64896965597989 has 32 divisors (see below), whose sum is σ = 75659430905856. Its totient is φ = 54519154522560.

The previous prime is 64896965597969. The next prime is 64896965598001. The reversal of 64896965597989 is 98979556969846.

It is not a de Polignac number, because 64896965597989 - 2¹⁹ = 64896965073701 is a prime.

It is a super-2 number, since 2×64896965597989² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64896965597894 and 64896965597903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64896965597969) 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 31 ways as a sum of consecutive naturals, for example, 56994174 + ... + 58121680.

It is an arithmetic number, because the mean of its divisors is an integer number (2364357215808).

Almost surely, 2^{64896965597989} is an apocalyptic number.

It is an amenable number.

64896965597989 is a deficient number, since it is larger than the sum of its proper divisors (10762465307867).

64896965597989 is a wasteful number, since it uses less digits than its factorization.

64896965597989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128385.

The product of its digits is 571405363200, while the sum is 100.

The spelling of 64896965597989 in words is "sixty-four trillion, eight hundred ninety-six billion, nine hundred sixty-five million, five hundred ninety-seven thousand, nine hundred eighty-nine".