64765544833 has 4 divisors (see below), whose sum is σ = 70653321648. Its totient is φ = 58877768020.

The previous prime is 64765544807. The next prime is 64765544849. The reversal of 64765544833 is 33844556746.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64765544833 - 2¹⁷ = 64765413761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64765544873) 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, 2943888391 + ... + 2943888412.

It is an arithmetic number, because the mean of its divisors is an integer number (17663330412).

Almost surely, 2^64765544833 is an apocalyptic number.

It is an amenable number.

64765544833 is a deficient number, since it is larger than the sum of its proper divisors (5887776815).

64765544833 is a wasteful number, since it uses less digits than its factorization.

64765544833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5887776814.

The product of its digits is 29030400, while the sum is 55.

The spelling of 64765544833 in words is "sixty-four billion, seven hundred sixty-five million, five hundred forty-four thousand, eight hundred thirty-three".