64852870104661 has 4 divisors (see below), whose sum is σ = 64852888464000. Its totient is φ = 64852851745324.

The previous prime is 64852870104647. The next prime is 64852870104677. The reversal of 64852870104661 is 16640107825846.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64852870104661 - 2¹⁵ = 64852870071893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64852870104596 and 64852870104605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64852870108661) 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, 2019271 + ... + 11566468.

It is an arithmetic number, because the mean of its divisors is an integer number (16213222116000).

Almost surely, 2^{64852870104661} is an apocalyptic number.

It is an amenable number.

64852870104661 is a deficient number, since it is larger than the sum of its proper divisors (18359339).

64852870104661 is a wasteful number, since it uses less digits than its factorization.

64852870104661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18359338.

The product of its (nonzero) digits is 15482880, while the sum is 58.

The spelling of 64852870104661 in words is "sixty-four trillion, eight hundred fifty-two billion, eight hundred seventy million, one hundred four thousand, six hundred sixty-one".