6644157477047 has 8 divisors (see below), whose sum is σ = 6660061584000. Its totient is φ = 6628256868024.

The previous prime is 6644157477017. The next prime is 6644157477059. The reversal of 6644157477047 is 7407747514466.

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 6644157477047 - 2¹² = 6644157472951 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 (6644157477017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2948948 + ... + 4688774.

It is an arithmetic number, because the mean of its divisors is an integer number (832507698000).

Almost surely, 2^{6644157477047} is an apocalyptic number.

6644157477047 is a deficient number, since it is larger than the sum of its proper divisors (15904106953).

6644157477047 is a wasteful number, since it uses less digits than its factorization.

6644157477047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1748965.

The product of its (nonzero) digits is 110638080, while the sum is 62.

The spelling of 6644157477047 in words is "six trillion, six hundred forty-four billion, one hundred fifty-seven million, four hundred seventy-seven thousand, forty-seven".