64886215 has 4 divisors (see below), whose sum is σ = 77863464. Its totient is φ = 51908968.

The previous prime is 64886207. The next prime is 64886221. The reversal of 64886215 is 51268846.

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 64886215 - 2³ = 64886207 is a prime.

It is a Smith number, since the sum of its digits (40) 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 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, 6488617 + ... + 6488626.

It is an arithmetic number, because the mean of its divisors is an integer number (19465866).

Almost surely, 2^64886215 is an apocalyptic number.

64886215 is a deficient number, since it is larger than the sum of its proper divisors (12977249).

64886215 is a wasteful number, since it uses less digits than its factorization.

64886215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12977248.

The product of its digits is 92160, while the sum is 40.

The square root of 64886215 is about 8055.1980112223. The cubic root of 64886215 is about 401.8378243223.

The spelling of 64886215 in words is "sixty-four million, eight hundred eighty-six thousand, two hundred fifteen".