64894255 has 4 divisors (see below), whose sum is σ = 77873112. Its totient is φ = 51915400.

The previous prime is 64894243. The next prime is 64894259. The reversal of 64894255 is 55249846.

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

It is a de Polignac number, because none of the positive numbers 2^k-64894255 is a prime.

It is a super-2 number, since 2×64894255² = 8422528664010050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64894259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6489421 + ... + 6489430.

It is an arithmetic number, because the mean of its divisors is an integer number (19468278).

Almost surely, 2^64894255 is an apocalyptic number.

64894255 is a deficient number, since it is larger than the sum of its proper divisors (12978857).

64894255 is a wasteful number, since it uses less digits than its factorization.

64894255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12978856.

The product of its digits is 345600, while the sum is 43.

The square root of 64894255 is about 8055.6970523971. The cubic root of 64894255 is about 401.8544207733.

The spelling of 64894255 in words is "sixty-four million, eight hundred ninety-four thousand, two hundred fifty-five".