64723255 has 4 divisors (see below), whose sum is σ = 77667912. Its totient is φ = 51778600.

The previous prime is 64723237. The next prime is 64723261. The reversal of 64723255 is 55232746.

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

It is not a de Polignac number, because 64723255 - 2¹¹ = 64721207 is a prime.

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 64723255.

It is a congruent number.

It is an unprimeable number.

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, 6472321 + ... + 6472330.

It is an arithmetic number, because the mean of its divisors is an integer number (19416978).

Almost surely, 2^64723255 is an apocalyptic number.

64723255 is a deficient number, since it is larger than the sum of its proper divisors (12944657).

64723255 is a wasteful number, since it uses less digits than its factorization.

64723255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12944656.

The product of its digits is 50400, while the sum is 34.

The square root of 64723255 is about 8045.0764446337. The cubic root of 64723255 is about 401.5011406446.

The spelling of 64723255 in words is "sixty-four million, seven hundred twenty-three thousand, two hundred fifty-five".