64073616549 has 4 divisors (see below), whose sum is σ = 85431488736. Its totient is φ = 42715744364.

The previous prime is 64073616547. The next prime is 64073616583. The reversal of 64073616549 is 94561637046.

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 64073616549 - 2¹ = 64073616547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64073616547) 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, 10678936089 + ... + 10678936094.

It is an arithmetic number, because the mean of its divisors is an integer number (21357872184).

Almost surely, 2^64073616549 is an apocalyptic number.

It is an amenable number.

64073616549 is a deficient number, since it is larger than the sum of its proper divisors (21357872187).

64073616549 is a wasteful number, since it uses less digits than its factorization.

64073616549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21357872186.

The product of its (nonzero) digits is 3265920, while the sum is 51.

The spelling of 64073616549 in words is "sixty-four billion, seventy-three million, six hundred sixteen thousand, five hundred forty-nine".