64486952815 has 4 divisors (see below), whose sum is σ = 77384343384. Its totient is φ = 51589562248.

The previous prime is 64486952801. The next prime is 64486952833. The reversal of 64486952815 is 51825968446.

It is a happy number.

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 64486952815 - 2¹⁷ = 64486821743 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64486952815.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6448695277 + ... + 6448695286.

It is an arithmetic number, because the mean of its divisors is an integer number (19346085846).

Almost surely, 2^64486952815 is an apocalyptic number.

64486952815 is a deficient number, since it is larger than the sum of its proper divisors (12897390569).

64486952815 is a wasteful number, since it uses less digits than its factorization.

64486952815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12897390568.

The product of its digits is 16588800, while the sum is 58.

The spelling of 64486952815 in words is "sixty-four billion, four hundred eighty-six million, nine hundred fifty-two thousand, eight hundred fifteen".