64767041664447 has 4 divisors (see below), whose sum is σ = 86356055552600. Its totient is φ = 43178027776296.

The previous prime is 64767041664397. The next prime is 64767041664463. The reversal of 64767041664447 is 74446614076746.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 64767041664447 - 2⁶ = 64767041664383 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 (64767041664847) 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, 10794506944072 + ... + 10794506944077.

It is an arithmetic number, because the mean of its divisors is an integer number (21589013888150).

Almost surely, 2^{64767041664447} is an apocalyptic number.

64767041664447 is a deficient number, since it is larger than the sum of its proper divisors (21589013888153).

64767041664447 is a wasteful number, since it uses less digits than its factorization.

64767041664447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21589013888152.

The product of its (nonzero) digits is 455196672, while the sum is 66.

The spelling of 64767041664447 in words is "sixty-four trillion, seven hundred sixty-seven billion, forty-one million, six hundred sixty-four thousand, four hundred forty-seven".