64949816285 has 8 divisors (see below), whose sum is σ = 77947150176. Its totient is φ = 51954939280.

The previous prime is 64949816231. The next prime is 64949816297. The reversal of 64949816285 is 58261894946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64949816285 - 2¹² = 64949812189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 555551 + ... + 662220.

It is an arithmetic number, because the mean of its divisors is an integer number (9743393772).

Almost surely, 2^64949816285 is an apocalyptic number.

It is an amenable number.

64949816285 is a deficient number, since it is larger than the sum of its proper divisors (12997333891).

64949816285 is a wasteful number, since it uses less digits than its factorization.

64949816285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228443.

The product of its digits is 29859840, while the sum is 62.

The spelling of 64949816285 in words is "sixty-four billion, nine hundred forty-nine million, eight hundred sixteen thousand, two hundred eighty-five".