647631065087 has 4 divisors (see below), whose sum is σ = 656752629456. Its totient is φ = 638509500720.

The previous prime is 647631065077. The next prime is 647631065099. The reversal of 647631065087 is 780560136746.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 647631065087 - 2⁴ = 647631065071 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 (647631065077) 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, 4560782078 + ... + 4560782219.

It is an arithmetic number, because the mean of its divisors is an integer number (164188157364).

Almost surely, 2^647631065087 is an apocalyptic number.

647631065087 is a deficient number, since it is larger than the sum of its proper divisors (9121564369).

647631065087 is an equidigital number, since it uses as much as digits as its factorization.

647631065087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9121564368.

The product of its (nonzero) digits is 5080320, while the sum is 53.

The spelling of 647631065087 in words is "six hundred forty-seven billion, six hundred thirty-one million, sixty-five thousand, eighty-seven".