64594960891 has 16 divisors (see below), whose sum is σ = 67823034048. Its totient is φ = 61459840000.

The previous prime is 64594960889. The next prime is 64594960909. The reversal of 64594960891 is 19806949546.

It is a cyclic number.

It is not a de Polignac number, because 64594960891 - 2¹ = 64594960889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64594960841) 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 15 ways as a sum of consecutive naturals, for example, 273891 + ... + 451891.

It is an arithmetic number, because the mean of its divisors is an integer number (4238939628).

Almost surely, 2^64594960891 is an apocalyptic number.

64594960891 is a deficient number, since it is larger than the sum of its proper divisors (3228073157).

64594960891 is a wasteful number, since it uses less digits than its factorization.

64594960891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178262.

The product of its (nonzero) digits is 16796160, while the sum is 61.

The spelling of 64594960891 in words is "sixty-four billion, five hundred ninety-four million, nine hundred sixty thousand, eight hundred ninety-one".