64944375604861 has 8 divisors (see below), whose sum is σ = 66146609249280. Its totient is φ = 63751645784112.

The previous prime is 64944375604841. The next prime is 64944375604883. The reversal of 64944375604861 is 16840657344946.

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

It is a cyclic number.

It is not a de Polignac number, because 64944375604861 - 2⁹ = 64944375604349 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 (64944375604841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2375942125 + ... + 2375969458.

It is an arithmetic number, because the mean of its divisors is an integer number (8268326156160).

Almost surely, 2^{64944375604861} is an apocalyptic number.

It is an amenable number.

64944375604861 is a deficient number, since it is larger than the sum of its proper divisors (1202233644419).

64944375604861 is a wasteful number, since it uses less digits than its factorization.

64944375604861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4751911835.

The product of its (nonzero) digits is 418037760, while the sum is 67.

The spelling of 64944375604861 in words is "sixty-four trillion, nine hundred forty-four billion, three hundred seventy-five million, six hundred four thousand, eight hundred sixty-one".