64815850627001 has 4 divisors (see below), whose sum is σ = 64815869155812. Its totient is φ = 64815832098192.

The previous prime is 64815850626977. The next prime is 64815850627039. The reversal of 64815850627001 is 10072605851846.

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

It can be written as a sum of positive squares in 2 ways, for example, as 46167064783225 + 18648785843776 = 6794635^2 + 4318424^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64815850627001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64815850627051) 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, 2243846 + ... + 11604591.

It is an arithmetic number, because the mean of its divisors is an integer number (16203967288953).

Almost surely, 2^{64815850627001} is an apocalyptic number.

It is an amenable number.

64815850627001 is a deficient number, since it is larger than the sum of its proper divisors (18528811).

64815850627001 is a wasteful number, since it uses less digits than its factorization.

64815850627001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18528810.

The product of its (nonzero) digits is 3225600, while the sum is 53.

The spelling of 64815850627001 in words is "sixty-four trillion, eight hundred fifteen billion, eight hundred fifty million, six hundred twenty-seven thousand, one".