64841855 has 16 divisors (see below), whose sum is σ = 84278880. Its totient is φ = 47607168.

The previous prime is 64841839. The next prime is 64841867. The reversal of 64841855 is 55814846.

It is a cyclic number.

It is not a de Polignac number, because 64841855 - 2⁴ = 64841839 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8849 + ... + 14421.

It is an arithmetic number, because the mean of its divisors is an integer number (5267430).

Almost surely, 2^64841855 is an apocalyptic number.

64841855 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

64841855 is a deficient number, since it is larger than the sum of its proper divisors (19437025).

64841855 is a wasteful number, since it uses less digits than its factorization.

64841855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5770.

The product of its digits is 153600, while the sum is 41.

The square root of 64841855 is about 8052.4440389238. Note that the first 3 decimals coincide. The cubic root of 64841855 is about 401.7462301903.

The spelling of 64841855 in words is "sixty-four million, eight hundred forty-one thousand, eight hundred fifty-five".