64244560247 has 4 divisors (see below), whose sum is σ = 73422354576. Its totient is φ = 55066765920.

The previous prime is 64244560241. The next prime is 64244560253. The reversal of 64244560247 is 74206544246.

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

It is an interprime number because it is at equal distance from previous prime (64244560241) and next prime (64244560253).

It is a cyclic number.

It is not a de Polignac number, because 64244560247 - 2⁶ = 64244560183 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64244560198 and 64244560207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64244560241) 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, 4588897154 + ... + 4588897167.

It is an arithmetic number, because the mean of its divisors is an integer number (18355588644).

Almost surely, 2^64244560247 is an apocalyptic number.

64244560247 is a deficient number, since it is larger than the sum of its proper divisors (9177794329).

64244560247 is an equidigital number, since it uses as much as digits as its factorization.

64244560247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9177794328.

The product of its (nonzero) digits is 1290240, while the sum is 44.

The spelling of 64244560247 in words is "sixty-four billion, two hundred forty-four million, five hundred sixty thousand, two hundred forty-seven".