64556665546 has 8 divisors (see below), whose sum is σ = 96842341440. Its totient is φ = 32275885068.

The previous prime is 64556665513. The next prime is 64556665549.

64556665546 is nontrivially palindromic in base 10.

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

It is not an unprimeable number, because it can be changed into a prime (64556665549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1190706 + ... + 1243741.

It is an arithmetic number, because the mean of its divisors is an integer number (12105292680).

Almost surely, 2^64556665546 is an apocalyptic number.

64556665546 is a deficient number, since it is larger than the sum of its proper divisors (32285675894).

64556665546 is a wasteful number, since it uses less digits than its factorization.

64556665546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2447708.

The product of its digits is 77760000, while the sum is 58.

The spelling of 64556665546 in words is "sixty-four billion, five hundred fifty-six million, six hundred sixty-five thousand, five hundred forty-six".