64748360609 has 4 divisors (see below), whose sum is σ = 64748880816. Its totient is φ = 64747840404.

The previous prime is 64748360591. The next prime is 64748360617. The reversal of 64748360609 is 90606384746.

64748360609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64748360609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64748350609) 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, 49202 + ... + 363204.

It is an arithmetic number, because the mean of its divisors is an integer number (16187220204).

Almost surely, 2^64748360609 is an apocalyptic number.

It is an amenable number.

64748360609 is a deficient number, since it is larger than the sum of its proper divisors (520207).

64748360609 is a wasteful number, since it uses less digits than its factorization.

64748360609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520206.

The product of its (nonzero) digits is 5225472, while the sum is 53.

The spelling of 64748360609 in words is "sixty-four billion, seven hundred forty-eight million, three hundred sixty thousand, six hundred nine".