64677277646 has 8 divisors (see below), whose sum is σ = 97017902280. Its totient is φ = 32337976888.

The previous prime is 64677277607. The next prime is 64677277649.

It is a happy number.

64677277646 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64677277649) 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, 198176 + ... + 410643.

It is an arithmetic number, because the mean of its divisors is an integer number (12127237785).

Almost surely, 2^64677277646 is an apocalyptic number.

64677277646 is a deficient number, since it is larger than the sum of its proper divisors (32340624634).

64677277646 is a wasteful number, since it uses less digits than its factorization.

64677277646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661938.

The product of its digits is 99574272, while the sum is 62.

The spelling of 64677277646 in words is "sixty-four billion, six hundred seventy-seven million, two hundred seventy-seven thousand, six hundred forty-six".