64865565348733 has 4 divisors (see below), whose sum is σ = 65833708115200. Its totient is φ = 63897422582268.

The previous prime is 64865565348697. The next prime is 64865565348791. The reversal of 64865565348733 is 33784356556846.

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 a de Polignac number, because none of the positive numbers 2^k-64865565348733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64865565345733) 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, 484071383133 + ... + 484071383266.

It is an arithmetic number, because the mean of its divisors is an integer number (16458427028800).

Almost surely, 2^{64865565348733} is an apocalyptic number.

It is an amenable number.

64865565348733 is a deficient number, since it is larger than the sum of its proper divisors (968142766467).

64865565348733 is an equidigital number, since it uses as much as digits as its factorization.

64865565348733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968142766466.

The product of its digits is 5225472000, while the sum is 73.

The spelling of 64865565348733 in words is "sixty-four trillion, eight hundred sixty-five billion, five hundred sixty-five million, three hundred forty-eight thousand, seven hundred thirty-three".